1
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Rapp J, Borden MA, Bhat V, Sarabia A, Leibfarth FA. Continuous Polymer Synthesis and Manufacturing of Polyurethane Elastomers Enabled by Automation. ACS POLYMERS AU 2024; 4:120-127. [PMID: 38618002 PMCID: PMC11010252 DOI: 10.1021/acspolymersau.3c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 04/16/2024]
Abstract
Connecting polymer synthesis and processing is an important challenge for streamlining the manufacturing of polymeric materials. In this work, the automated synthesis of acrylate-capped polyurethane oligomers is integrated with vat photopolymerization 3D printing. This strategy enabled the rapid manufacturing of a library of polyurethane-based elastomeric materials with differentiated thermal and mechanical properties. The automated semicontinuous batch synthesis approach proved enabling for resins with otherwise short shelf lives because of the intimate connection between synthesis, formulation, and processing. Structure-property studies demonstrated the ability to tune properties through systematic alteration of cross-link density and chemical composition.
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Affiliation(s)
- Johann
L. Rapp
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
| | - Meredith A. Borden
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
| | - Vittal Bhat
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
| | - Alexis Sarabia
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
| | - Frank A. Leibfarth
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27514, United States
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2
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Shimizu T, Whitfield R, Jones GR, Raji IO, Konkolewicz D, Truong NP, Anastasaki A. Controlling primary chain dispersity in network polymers: elucidating the effect of dispersity on degradation. Chem Sci 2023; 14:13419-13428. [PMID: 38033899 PMCID: PMC10685271 DOI: 10.1039/d3sc05203f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023] Open
Abstract
Although dispersity has been demonstrated to be instrumental in determining many polymer properties, current synthetic strategies predominantly focus on tailoring the dispersity of linear polymers. In contrast, controlling the primary chain dispersity in network polymers is much more challenging, in part due to the complex nature of the reactions, which has limited the exploration of properties and applications. Here, a one-step method to prepare networks with precisely tuned primary chain dispersity is presented. By using an acid-switchable chain transfer agent and a degradable crosslinker in PET-RAFT polymerization, the in situ crosslinking of the propagating polymer chains was achieved in a quantitative manner. The incorporation of a degradable crosslinker, not only enables the accurate quantification of the various primary chain dispersities, post-synthesis, but also allows the investigation and comparison of their respective degradation profiles. Notably, the highest dispersity networks resulted in a 40% increase in degradation time when compared to their lower dispersity analogues, demonstrating that primary chain dispersity has a substantial impact on the network degradation rate. Our experimental findings were further supported by simulations, which emphasized the importance of higher molecular weight polymer chains, found within the high dispersity materials, in extending the lifetime of the network. This methodology presents a new and promising avenue to precisely tune primary chain dispersity within networks and demonstrates that polymer dispersity is an important parameter to consider when designing degradable materials.
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Affiliation(s)
- Takanori Shimizu
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
- Science & Innovation Center, Mitsubishi Chemical Corporation 1000 Kamoshida-cho, Aoba-ku Yokohama-shi Kanagawa 227-8502 Japan
| | - Richard Whitfield
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
| | - Glen R Jones
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
| | - Ibrahim O Raji
- Department of Chemistry and Biochemistry, Miami University 651 E High St Oxford OH 45056 USA
| | - Dominik Konkolewicz
- Department of Chemistry and Biochemistry, Miami University 651 E High St Oxford OH 45056 USA
| | - Nghia P Truong
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
| | - Athina Anastasaki
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
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3
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Rigoglioso VP, Boydston AJ. Flow Optimization of Photoredox-Mediated Metal-Free Ring-Opening Metathesis Polymerization. ACS Macro Lett 2023; 12:1479-1485. [PMID: 37870749 DOI: 10.1021/acsmacrolett.3c00545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
Photoredox-mediated metal-free ring-opening metathesis polymerization (MF-ROMP) is a convenient metal-free method to produce a variety of ROMP polymers. Transitioning MF-ROMP from a batch to a continuous flow process has yet to be demonstrated and could potentially benefit the production efficiency, safety, and modularity of reaction conditions. We designed and evaluated continuous flow and droplet flow setups and compared the results for MF-ROMP across a short series of common monomers. By using the droplet flow reactor setup, we achieved flow conversions comparable to that of batch and circumvented issues with diffusion-limited mixing and air exposure.
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Affiliation(s)
- Vincent P Rigoglioso
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Andrew J Boydston
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Chemical and Biological Engineering, Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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4
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Davidson CLG, Lott ME, Trachsel L, Wong AJ, Olson RA, Pedro DI, Sawyer WG, Sumerlin BS. Inverse Miniemulsion Enables the Continuous-Flow Synthesis of Controlled Ultra-High Molecular Weight Polymers. ACS Macro Lett 2023; 12:1224-1230. [PMID: 37624643 DOI: 10.1021/acsmacrolett.3c00431] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
We report the controlled synthesis of ultra-high molecular weight (UHMW) polymers (Mn ≥ 106 g/mol) via continuous flow in a tubular reactor. At high monomer conversion, UHMW polymers in homogeneous batch polymerization exhibit high viscosities that pose challenges for employing continuous flow reactors. However, under heterogeneous inverse miniemulsion (IME) conditions, UHMW polymers can be produced within the dispersed phase, while the viscosity of the heterogeneous mixture remains approximately the same as the viscosity of the continuous phase. Conducting such IME polymerizations in flow results in a faster rate of polymerization compared to batch IME polymerizations while still providing excellent control over molecular weight up to 106 g/mol. Crucial emulsion parameters, such as particle size and stability under continuous flow conditions, were examined using dynamic light scattering. A range of poly(N,N-dimethylacrylamide) and poly(4-acryloylmorpholine) polymers with molecular weights of 104-106 g/mol (Đ ≤ 1.31) were produced by this method using water-soluble trithiocarbonates as photoiniferters.
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Affiliation(s)
- Cullen L G Davidson
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Megan E Lott
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Lucca Trachsel
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Alexander J Wong
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Rebecca A Olson
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Diego I Pedro
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - W Gregory Sawyer
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Brent S Sumerlin
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
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5
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Wilding CYP, Knox ST, Bourne RA, Warren NJ. Development and Experimental Validation of a Dispersity Model for In Silico RAFT Polymerization. Macromolecules 2023; 56:1581-1591. [PMID: 36874531 PMCID: PMC9979647 DOI: 10.1021/acs.macromol.2c01798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/20/2023] [Indexed: 02/11/2023]
Abstract
The exploitation of computational techniques to predict the outcome of chemical reactions is becoming commonplace, enabling a reduction in the number of physical experiments required to optimize a reaction. Here, we adapt and combine models for polymerization kinetics and molar mass dispersity as a function of conversion for reversible addition fragmentation chain transfer (RAFT) solution polymerization, including the introduction of a novel expression accounting for termination. A flow reactor operating under isothermal conditions was used to experimentally validate the models for the RAFT polymerization of dimethyl acrylamide with an additional term to accommodate the effect of residence time distribution. Further validation is conducted in a batch reactor, where a previously recorded in situ temperature monitoring provides the ability to model the system under more representative batch conditions, accounting for slow heat transfer and the observed exotherm. The model also shows agreement with several literature examples of the RAFT polymerization of acrylamide and acrylate monomers in batch reactors. In principle, the model not only provides a tool for polymer chemists to estimate ideal conditions for a polymerization, but it can also automatically define the initial parameter space for exploration by computationally controlled reactor platforms provided a reliable estimation of rate constants is available. The model is compiled into an easily accessible application to enable simulation of RAFT polymerization of several monomers.
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Affiliation(s)
- Clarissa Y P Wilding
- School of Chemical and Process Engineering, University of Leeds, LS2 9JT Leeds, U.K.,Institute of Process Research and Development, School of Chemistry, University of Leeds, LS2 9JT Leeds, U.K
| | - Stephen T Knox
- School of Chemical and Process Engineering, University of Leeds, LS2 9JT Leeds, U.K.,Institute of Process Research and Development, School of Chemistry, University of Leeds, LS2 9JT Leeds, U.K
| | - Richard A Bourne
- School of Chemical and Process Engineering, University of Leeds, LS2 9JT Leeds, U.K.,Institute of Process Research and Development, School of Chemistry, University of Leeds, LS2 9JT Leeds, U.K
| | - Nicholas J Warren
- School of Chemical and Process Engineering, University of Leeds, LS2 9JT Leeds, U.K.,Institute of Process Research and Development, School of Chemistry, University of Leeds, LS2 9JT Leeds, U.K
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6
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Liu J, Fan K, Li X, Qin R, Wang X, Liu X, Liu X. Brand-New Method toward Widely Regulating Polymer Dispersity by Two-Dimensional Confining Radical Polymerization. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaxiang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Kun Fan
- College of Electrical Engineering, Sichuan University, Chengdu 610065, China
| | - Xin Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Rui Qin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xu Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xikui Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xiangyang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
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7
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Wang Y, Tan X, Usman A, Zhang Y, Sawczyk M, Král P, Zhang C, Whittaker AK. Elucidating the Impact of Hydrophilic Segments on 19F MRI Sensitivity of Fluorinated Block Copolymers. ACS Macro Lett 2022; 11:1195-1201. [DOI: 10.1021/acsmacrolett.2c00414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yiqing Wang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Xiao Tan
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Adil Usman
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yuhao Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Michał Sawczyk
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Petr Král
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Cheng Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Andrew K. Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, Brisbane, QLD 4072, Australia
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8
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Taylor NG, Reis MH, Varner TP, Rapp JL, Sarabia A, Leibfarth FA. A dual initiator approach for oxygen tolerant RAFT polymerization. Polym Chem 2022; 13:4798-4808. [PMID: 37799166 PMCID: PMC10552776 DOI: 10.1039/d2py00603k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Reversible-deactivation radical polymerizations are privileged approaches for the synthesis of functional and hybrid materials. A bottleneck for conducting these processes is the need to maintain oxygen free conditions. Herein we report a broadly applicable approach to "polymerize through" oxygen using the synergistic combination of two radical initiators having different rates of homolysis. The in situ monitoring of the concentrations of oxygen and monomer simultaneously provided insight into the function of the two initiators and enabled the identification of conditions to effectively remove dissolved oxygen and control polymerization under open-to-air conditions. By understanding how the surface area to volume ratio of reaction vessels influence open-to-air polymerizations, well-defined polymers were produced using acrylate, styrenic, and methacrylate monomers, which each represent an expansion of scope for the "polymerizing through" oxygen approach. Demonstration of this method in tubular reactors using continuous flow chemistry provided a more complete structure-reactivity understanding of how reaction headspace influences PTO RAFT polymerizations.
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Affiliation(s)
- Nicholas G Taylor
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Marcus H Reis
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Travis P Varner
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Johann L Rapp
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Alexis Sarabia
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Frank A Leibfarth
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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9
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Pasha M, Liu S, Zhang J, Qiu M, Su Y. Recent Advancements on Hydrodynamics and Mass Transfer Characteristics for CO 2 Absorption in Microreactors. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mohsin Pasha
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Saier Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Jin Zhang
- College of Economics and Law, Shijiazhuang Tiedao University, Hebei 050043, People’s Republic of China
| | - Min Qiu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Yuanhai Su
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
- Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
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10
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Numerical and experimental analysis of effective passive mixing via a 3D serpentine channel. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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11
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Kumar R. Materiomically Designed Polymeric Vehicles for Nucleic Acids: Quo Vadis? ACS APPLIED BIO MATERIALS 2022; 5:2507-2535. [PMID: 35642794 DOI: 10.1021/acsabm.2c00346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite rapid advances in molecular biology, particularly in site-specific genome editing technologies, such as CRISPR/Cas9 and base editing, financial and logistical challenges hinder a broad population from accessing and benefiting from gene therapy. To improve the affordability and scalability of gene therapy, we need to deploy chemically defined, economical, and scalable materials, such as synthetic polymers. For polymers to deliver nucleic acids efficaciously to targeted cells, they must optimally combine design attributes, such as architecture, length, composition, spatial distribution of monomers, basicity, hydrophilic-hydrophobic phase balance, or protonation degree. Designing polymeric vectors for specific nucleic acid payloads is a multivariate optimization problem wherein even minuscule deviations from the optimum are poorly tolerated. To explore the multivariate polymer design space rapidly, efficiently, and fruitfully, we must integrate parallelized polymer synthesis, high-throughput biological screening, and statistical modeling. Although materiomics approaches promise to streamline polymeric vector development, several methodological ambiguities must be resolved. For instance, establishing a flexible polymer ontology that accommodates recent synthetic advances, enforcing uniform polymer characterization and data reporting standards, and implementing multiplexed in vitro and in vivo screening studies require considerable planning, coordination, and effort. This contribution will acquaint readers with the challenges associated with materiomics approaches to polymeric gene delivery and offers guidelines for overcoming these challenges. Here, we summarize recent developments in combinatorial polymer synthesis, high-throughput screening of polymeric vectors, omics-based approaches to polymer design, barcoding schemes for pooled in vitro and in vivo screening, and identify materiomics-inspired research directions that will realize the long-unfulfilled clinical potential of polymeric carriers in gene therapy.
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Affiliation(s)
- Ramya Kumar
- Department of Chemical & Biological Engineering, Colorado School of Mines, 1613 Illinois St, Golden, Colorado 80401, United States
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12
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Precision Polymer Synthesis by Controlled Radical Polymerization: Fusing the progress from Polymer Chemistry and Reaction Engineering. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101555] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Residence time distribution in reactive and non-reactive flow systems in micro and millidevices. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117163] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Hakobyan K, Xu J, Müllner M. The challenges of controlling polymer synthesis at the molecular and macromolecular level. Polym Chem 2022. [DOI: 10.1039/d1py01581h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this Perspective, we outline advances and challenges in controlling the structure of polymers at various size regimes in the context of structural features such as molecular weight distribution, end groups, architecture, composition and sequence.
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Affiliation(s)
- Karen Hakobyan
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia
| | - Jiangtao Xu
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia
| | - Markus Müllner
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
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15
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Xiang L, Zhong Z, Shang M, Su Y. Microflow synthesis of stimuli-responsive star polymers and its application on catalytic reduction. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124383] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Knox ST, Parkinson SJ, Wilding CYP, Bourne R, Warren NJ. Autonomous polymer synthesis delivered by multi-objective closed-loop optimisation. Polym Chem 2022. [DOI: 10.1039/d2py00040g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of artificial intelligence and machine learning for polymer discovery offers an opportunity to meet the drastic need for the next generation high performing and sustainable polymer materials. Here, these...
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17
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Den Haese M, Gemoets HPL, Van Aken K, Pitet LM. Fully biobased triblock copolymers generated using an unconventional oscillatory plug flow reactor. Polym Chem 2022. [DOI: 10.1039/d2py00600f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Producing block polymers in continuous flow offers significant advantages in terms of versatility, efficiency and scalability.
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Affiliation(s)
- Milan Den Haese
- Advanced Functional Polymers Laboratory, Institute for Materials Research (IMO), Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
| | | | - Koen Van Aken
- Creaflow B.V., Industrielaan 12, 9800 Deinze, Belgium
| | - Louis M. Pitet
- Advanced Functional Polymers Laboratory, Institute for Materials Research (IMO), Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
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18
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Wang HS, Parkatzidis K, Harrisson S, Truong NP, Anastasaki A. Controlling dispersity in aqueous atom transfer radical polymerization: rapid and quantitative synthesis of one-pot block copolymers. Chem Sci 2021; 12:14376-14382. [PMID: 34880988 PMCID: PMC8580105 DOI: 10.1039/d1sc04241f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/23/2021] [Indexed: 12/03/2022] Open
Abstract
The dispersity (Đ) of a polymer is a key parameter in material design, and variations in Đ can have a strong influence on fundamental polymer properties. Despite its importance, current polymerization strategies to control Đ operate exclusively in organic media and are limited by slow polymerization rates, moderate conversions, significant loss of initiator efficiency and lack of dispersity control in block copolymers. Here, we demonstrate a rapid and quantitative method to tailor Đ of both homo and block copolymers in aqueous atom transfer radical polymerization. By using excess ligand to regulate the dissociation of bromide ions from the copper deactivator complexes, a wide range of monomodal molecular weight distributions (1.08 < Đ < 1.60) can be obtained within 10 min while achieving very high monomer conversions (∼99%). Despite the high conversions and the broad molecular weight distributions, very high end-group fidelity is maintained as exemplified by the ability to synthesize in situ diblock copolymers with absolute control over the dispersity of either block (e.g. low Đ → high Đ, high Đ → high Đ, high Đ → low Đ). The potential of our approach is further highlighted by the synthesis of complex pentablock and decablock copolymers without any need for purification between the iterative block formation steps. Other benefits of our methodology include the possibility to control Đ without affecting the M n, the interesting mechanistic concept that sheds light onto aqueous polymerizations and the capability to operate in the presence of air.
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Affiliation(s)
- Hyun Suk Wang
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir-Prelog-Weg 5 Zurich Switzerland
| | - Kostas Parkatzidis
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir-Prelog-Weg 5 Zurich Switzerland
| | - Simon Harrisson
- LCPO, ENSCBP/CNRS/Université de Bordeaux, UMR5629 Pessac France
| | - Nghia P Truong
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir-Prelog-Weg 5 Zurich Switzerland
| | - Athina Anastasaki
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir-Prelog-Weg 5 Zurich Switzerland
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19
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Reis M, Gusev F, Taylor NG, Chung SH, Verber MD, Lee YZ, Isayev O, Leibfarth FA. Machine-Learning-Guided Discovery of 19F MRI Agents Enabled by Automated Copolymer Synthesis. J Am Chem Soc 2021; 143:17677-17689. [PMID: 34637304 PMCID: PMC10833148 DOI: 10.1021/jacs.1c08181] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Modern polymer science suffers from the curse of multidimensionality. The large chemical space imposed by including combinations of monomers into a statistical copolymer overwhelms polymer synthesis and characterization technology and limits the ability to systematically study structure-property relationships. To tackle this challenge in the context of 19F magnetic resonance imaging (MRI) agents, we pursued a computer-guided materials discovery approach that combines synergistic innovations in automated flow synthesis and machine learning (ML) method development. A software-controlled, continuous polymer synthesis platform was developed to enable iterative experimental-computational cycles that resulted in the synthesis of 397 unique copolymer compositions within a six-variable compositional space. The nonintuitive design criteria identified by ML, which were accomplished by exploring <0.9% of the overall compositional space, lead to the identification of >10 copolymer compositions that outperformed state-of-the-art materials.
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Affiliation(s)
- Marcus Reis
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Filipp Gusev
- Department of Chemistry, Mellon College of Science, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Nicholas G Taylor
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Sang Hun Chung
- Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Matthew D Verber
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Yueh Z Lee
- Department of Radiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Olexandr Isayev
- Department of Chemistry, Mellon College of Science, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Frank A Leibfarth
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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20
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Shimizu T, Truong NP, Whitfield R, Anastasaki A. Tuning Ligand Concentration in Cu(0)-RDRP: A Simple Approach to Control Polymer Dispersity. ACS POLYMERS AU 2021; 1:187-195. [PMID: 34901951 PMCID: PMC8662723 DOI: 10.1021/acspolymersau.1c00030] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 12/15/2022]
Abstract
Cu(0)-reversible deactivation radical polymerization (RDRP) is a versatile polymerization tool, providing rapid access to well-defined polymers while utilizing mild reaction conditions and low catalyst loadings. However, thus far, this method has not been applied to tailor dispersity, a key parameter that determines the physical properties and applications of polymeric materials. Here, we report a simple to perform method, whereby Cu(0)-RDRP can systematically control polymer dispersity (Đ = 1.07-1.72), while maintaining monomodal molecular weight distributions. By varying the ligand concentration, we could effectively regulate the rates of initiation and deactivation, resulting in polymers of various dispersities. Importantly, both low and high dispersity PMA possess high end-group fidelity, as evidenced by MALDI-ToF-MS, allowing for a range of block copolymers to be prepared with different dispersity configurations. The scope of our method can also be extended to include inexpensive ligands (i.e., PMDETA), which also facilitated the polymerization of lower propagation rate constant monomers (i.e., styrene) and the in situ synthesis of block copolymers. This work significantly expands the toolbox of RDRP methods for tailoring dispersity in polymeric materials.
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Affiliation(s)
- Takanori Shimizu
- Laboratory
of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland,Science
& Innovation Center, Mitsubishi Chemical
Corporation, 1000 Kamoshida-cho, Aoba-ku,
Yokohama-shi, Kanagawa 227-8502, Japan
| | - Nghia P. Truong
- Laboratory
of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland
| | - Richard Whitfield
- Laboratory
of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland,
| | - Athina Anastasaki
- Laboratory
of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland,
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21
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Morin MA, Zhang W(P, Mallik D, Organ MG. Sampling and Analysis in Flow: The Keys to Smarter, More Controllable, and Sustainable Fine‐Chemical Manufacturing. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mathieu A. Morin
- Department of Chemistry and Biomolecular Sciences Centre for Catalysis Research and Innovation (CCRI) University of Ottawa 10 Marie Curie Ottawa ON K1N 6N5 Canada
- Department of Chemistry Carleton University 203 Steacie Building, 1125 Colonel By Drive Ottawa ON K1S 5B6 Canada
| | - Wenyao (Peter) Zhang
- Department of Chemistry York University 4700 Keele Street Toronto ON M3J 1P3 Canada
| | - Debasis Mallik
- Department of Chemistry and Biomolecular Sciences Centre for Catalysis Research and Innovation (CCRI) University of Ottawa 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Michael G. Organ
- Department of Chemistry and Biomolecular Sciences Centre for Catalysis Research and Innovation (CCRI) University of Ottawa 10 Marie Curie Ottawa ON K1N 6N5 Canada
- Department of Chemistry York University 4700 Keele Street Toronto ON M3J 1P3 Canada
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22
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Morin MA, Zhang WP, Mallik D, Organ MG. Sampling and Analysis in Flow: The Keys to Smarter, More Controllable, and Sustainable Fine-Chemical Manufacturing. Angew Chem Int Ed Engl 2021; 60:20606-20626. [PMID: 33811800 DOI: 10.1002/anie.202102009] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/23/2021] [Indexed: 11/08/2022]
Abstract
Process analytical technology (PAT) is a system designed to help chemists better understand and control manufacturing processes. PAT systems operate through the combination of analytical devices, reactor control elements, and mathematical models to ensure the quality of the final product through a quality by design (QbD) approach. The expansion of continuous manufacturing in the pharmaceutical and fine-chemical industry requires the development of PAT tools suitable for continuous operation in the environment of flow reactors. This requires innovative approaches to sampling and analysis from flowing media to maintain the integrity of the reactor content and the analyte of interest. The following Review discusses examples of PAT tools implemented in flow chemistry for the preparation of small organic molecules, and applications of self-optimization tools.
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Affiliation(s)
- Mathieu A Morin
- Department of Chemistry and Biomolecular Sciences, Centre for Catalysis Research and Innovation (CCRI), University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, Canada.,Department of Chemistry, Carleton University, 203 Steacie Building, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada
| | - Wenyao Peter Zhang
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
| | - Debasis Mallik
- Department of Chemistry and Biomolecular Sciences, Centre for Catalysis Research and Innovation (CCRI), University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, Canada
| | - Michael G Organ
- Department of Chemistry and Biomolecular Sciences, Centre for Catalysis Research and Innovation (CCRI), University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, Canada.,Department of Chemistry, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
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23
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Precise Control of Both Dispersity and Molecular Weight Distribution Shape by Polymer Blending. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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24
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Whitfield R, Truong NP, Anastasaki A. Precise Control of Both Dispersity and Molecular Weight Distribution Shape by Polymer Blending. Angew Chem Int Ed Engl 2021; 60:19383-19388. [PMID: 34133078 PMCID: PMC8456836 DOI: 10.1002/anie.202106729] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Indexed: 12/30/2022]
Abstract
The breadth and the shape of molecular weight distributions can significantly influence fundamental polymer properties that are critical for various applications. However, current approaches require the extensive synthesis of multiple polymers, are limited in dispersity precision and are typically incapable of simultaneously controlling both the dispersity and the shape of molecular weight distributions. Here we report a simplified approach, whereby on mixing two polymers (one of high Đ and one of low Đ), any intermediate dispersity value can be obtained (e.g. from 1.08 to 1.84). Unrivalled precision is achieved, with dispersity values obtained to even the nearest 0.01 (e.g. 1.37→1.38→1.39→1.40→1.41→1.42→1.43→1.44→1.45), while maintaining fairly monomodal molecular weight distributions. This approach was also employed to control the shape of molecular weight distributions and to obtain diblock copolymers with high dispersity accuracy. The straightforward nature of our methodology alongside its compatibility with a wide range of polymerisation protocols (e.g. ATRP, RAFT), significantly expands the toolbox of tailored polymeric materials and makes them accessible to all researchers.
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Affiliation(s)
- Richard Whitfield
- Laboratory of Polymeric MaterialsDepartment of MaterialsETH ZurichVladimir-Prelog-Weg 58093ZurichSwitzerland
| | - Nghia P. Truong
- Laboratory of Polymeric MaterialsDepartment of MaterialsETH ZurichVladimir-Prelog-Weg 58093ZurichSwitzerland
| | - Athina Anastasaki
- Laboratory of Polymeric MaterialsDepartment of MaterialsETH ZurichVladimir-Prelog-Weg 58093ZurichSwitzerland
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25
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Mokkarat A, Kruanetr S, Sakee U. Simple continuous flow synthesis of 3-indolyl naphthoquinone using acid catalysts. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1934701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | | | - Uthai Sakee
- Mahasarakham University, Mahasarakham, Thailand
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26
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Asymmetric behaviors of interface-stabilized slug pairs in a T-junction microchannel reactor. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116668] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Soheilmoghaddam F, Rumble M, Cooper-White J. High-Throughput Routes to Biomaterials Discovery. Chem Rev 2021; 121:10792-10864. [PMID: 34213880 DOI: 10.1021/acs.chemrev.0c01026] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many existing clinical treatments are limited in their ability to completely restore decreased or lost tissue and organ function, an unenviable situation only further exacerbated by a globally aging population. As a result, the demand for new medical interventions has increased substantially over the past 20 years, with the burgeoning fields of gene therapy, tissue engineering, and regenerative medicine showing promise to offer solutions for full repair or replacement of damaged or aging tissues. Success in these fields, however, inherently relies on biomaterials that are engendered with the ability to provide the necessary biological cues mimicking native extracellular matrixes that support cell fate. Accelerating the development of such "directive" biomaterials requires a shift in current design practices toward those that enable rapid synthesis and characterization of polymeric materials and the coupling of these processes with techniques that enable similarly rapid quantification and optimization of the interactions between these new material systems and target cells and tissues. This manuscript reviews recent advances in combinatorial and high-throughput (HT) technologies applied to polymeric biomaterial synthesis, fabrication, and chemical, physical, and biological screening with targeted end-point applications in the fields of gene therapy, tissue engineering, and regenerative medicine. Limitations of, and future opportunities for, the further application of these research tools and methodologies are also discussed.
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Affiliation(s)
- Farhad Soheilmoghaddam
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Madeleine Rumble
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Justin Cooper-White
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
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28
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Rolland M, Lohmann V, Whitfield R, Truong NP, Anastasaki A. Understanding dispersity control in
photo‐
atom transfer radical polymerization: Effect of degree of polymerization and kinetic evaluation. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210319] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Manon Rolland
- Laboratory of Polymeric Materials, Department of Materials ETH Zürich Zürich Switzerland
| | - Victoria Lohmann
- Laboratory of Polymeric Materials, Department of Materials ETH Zürich Zürich Switzerland
| | - Richard Whitfield
- Laboratory of Polymeric Materials, Department of Materials ETH Zürich Zürich Switzerland
| | - Nghia P. Truong
- Laboratory of Polymeric Materials, Department of Materials ETH Zürich Zürich Switzerland
| | - Athina Anastasaki
- Laboratory of Polymeric Materials, Department of Materials ETH Zürich Zürich Switzerland
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29
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Wang CG, Chong AML, Goto A. One Reagent with Two Functions: Simultaneous Living Radical Polymerization and Chain-End Substitution for Tailoring Polymer Dispersity. ACS Macro Lett 2021; 10:584-590. [PMID: 35570769 DOI: 10.1021/acsmacrolett.1c00179] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The molecular weight distribution of polymer, termed dispersity (Đ), is a fundamental parameter that determines polymer properties. Sodium azide (NaN3) functions as a catalyst in organocatalyzed living radical polymerization when the reaction medium is nonpolar. In contrast, NaN3 can act as a nucleophile when the reaction medium is polar. In this paper, we report an efficient approach to dispersity control by exploiting the dual functions of NaN3 under the varied solvent polarity. Simultaneous polymerization and chain-end substitution allowed us to tune the Đ values of various polymethacrylates and poly(butyl acrylate). Notably, the Đ value could be tuned to a wide range approximately from 1.2 to 2.0 for polymethacrylates and to 3.8 for poly(butyl acrylate). This approach afforded polymer brushes on surfaces with tailored Đ values. An interesting finding was that the polymer brushes exhibited a unique interaction with external molecules, depending on the Đ value.
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Affiliation(s)
- Chen-Gang Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Amerlyn Ming Liing Chong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Atsushi Goto
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
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30
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Li M, Zhang Y, Zhang J, Peng M, Yan L, Tang Z, Wu Q. Continuous Gas–Liquid–Solid Slug Flow for Sustainable Heterogeneously Catalyzed PET-RAFT Polymerization. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00361] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Minglei Li
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai, 200444, People’s Republic of China
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201203, People’s Republic of China
| | - Yaheng Zhang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201203, People’s Republic of China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Jie Zhang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201203, People’s Republic of China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
| | - Min Peng
- Analytical Instrumentation
Center, School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, People’s Republic of China
| | - Liuming Yan
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai, 200444, People’s Republic of China
| | - Zhiyong Tang
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201203, People’s Republic of China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
- School of Chemistry and Material Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, People’s Republic of China
| | - Qing Wu
- Department of Science and Technology Development, China National Offshore Oil Corporation, Beijing, 100010, People’s Republic of China
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31
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32
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Zhou Y, Han S, Gu Y, Chen M. Facile synthesis of gradient copolymers enabled by droplet-flow photo-controlled reversible deactivation radical polymerization. Sci China Chem 2021. [DOI: 10.1007/s11426-020-9946-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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33
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Corrigan N, Trujillo FJ, Xu J, Moad G, Hawker CJ, Boyer C. Divergent Synthesis of Graft and Branched Copolymers through Spatially Controlled Photopolymerization in Flow Reactors. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02715] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Nathaniel Corrigan
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | | | - Jiangtao Xu
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Graeme Moad
- CSIRO Manufacturing, Bag 10, Clayton South, VIC 3169, Australia
| | - Craig J. Hawker
- Materials Research Laboratory and Departments of Materials, Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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34
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Rodrigues AE. Residence time distribution (RTD) revisited. Chem Eng Sci 2021; 230:116188. [PMID: 33041349 PMCID: PMC7532993 DOI: 10.1016/j.ces.2020.116188] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 09/09/2020] [Accepted: 09/28/2020] [Indexed: 11/15/2022]
Abstract
Residence Time Distribution (RTD) theory is revisited and tracer technology discussed. The background of RTD following Danckwerts ideas is presented by introducing "distribution" functions for residence time, internal age and intensity function and how to experimentally obtain them with tracer techniques (curves C and F of Danckwerts). Compartment models to describe fluid flow in real reactors are reviewed and progressive modeling of chromatographic processes discussed in some detail. The shortcomings of Standard Dispersion Model (SDM) are addressed, the Taylor-Aris model discussed and the Wave Model of Westerterp's group introduced. The contribution of Computational Fluid Dynamics (CFD) is highlighted to calculate RTD from momentum and mass transport equations and to access spatial age distribution and degree of mixing. Finally smart RTD and future challenges are discussed.
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Affiliation(s)
- Alírio E Rodrigues
- Emeritus Professor, Laboratory of Separation and Reaction Engineering (LSRE), Associate Laboratory LSRE-LCM, Department of Chemical Engineering, Faculty of Engineering, University of Porto (FEUP) Rua Dr Roberto Frias s/n 4200-465 Porto, Portugal
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35
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Kandelhard F, Schuldt K, Schymura J, Georgopanos P, Abetz V. Model‐Assisted Optimization of RAFT Polymerization in Micro‐Scale Reactors—A Fast Screening Approach. MACROMOL REACT ENG 2021. [DOI: 10.1002/mren.202000058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Felix Kandelhard
- Helmholtz‐Zentrum Geesthacht Institute of Membrane Research Max‐Planck‐Str. 1 Geesthacht 21502 Germany
| | - Karina Schuldt
- Helmholtz‐Zentrum Geesthacht Institute of Membrane Research Max‐Planck‐Str. 1 Geesthacht 21502 Germany
| | - Juliane Schymura
- Helmholtz‐Zentrum Geesthacht Institute of Membrane Research Max‐Planck‐Str. 1 Geesthacht 21502 Germany
| | - Prokopios Georgopanos
- Helmholtz‐Zentrum Geesthacht Institute of Membrane Research Max‐Planck‐Str. 1 Geesthacht 21502 Germany
| | - Volker Abetz
- Helmholtz‐Zentrum Geesthacht Institute of Membrane Research Max‐Planck‐Str. 1 Geesthacht 21502 Germany
- Institute of Physical Chemistry University of Hamburg Martin‐Luther‐King‐Platz 6 Hamburg 20146 Germany
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36
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Challenges and Recent Developments of Photoflow-Reversible Deactivation Radical Polymerization (RDRP). CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2529-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Yin R, Wang Z, Bockstaller MR, Matyjaszewski K. Tuning dispersity of linear polymers and polymeric brushes grown from nanoparticles by atom transfer radical polymerization. Polym Chem 2021. [DOI: 10.1039/d1py01178b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Molecular weight distribution imposes considerable influence on the properties of polymers, making it an important parameter, impacting morphology and structural behavior of polymeric materials.
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Affiliation(s)
- Rongguan Yin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - Zongyu Wang
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - Michael R. Bockstaller
- Department of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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38
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Parkatzidis K, Rolland M, Truong NP, Anastasaki A. Tailoring polymer dispersity by mixing ATRP initiators. Polym Chem 2021. [DOI: 10.1039/d1py01044a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Herein we present a simple batch method to control polymer dispersity using a mixture of two ATRP initiators with different reactivities.
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Affiliation(s)
- Kostas Parkatzidis
- Laboratory for Polymeric Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Manon Rolland
- Laboratory for Polymeric Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Nghia P. Truong
- Laboratory for Polymeric Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Athina Anastasaki
- Laboratory for Polymeric Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
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39
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Sivo A, Galaverna RDS, Gomes GR, Pastre JC, Vilé G. From circular synthesis to material manufacturing: advances, challenges, and future steps for using flow chemistry in novel application area. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00411a] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We review the emerging use of flow technologies for circular chemistry and material manufacturing, highlighting advances, challenges, and future directions.
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Affiliation(s)
- Alessandra Sivo
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- IT-20131 Milano
- Italy
| | | | | | | | - Gianvito Vilé
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- IT-20131 Milano
- Italy
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40
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Semsarilar M, Abetz V. Polymerizations by RAFT: Developments of the Technique and Its Application in the Synthesis of Tailored (Co)polymers. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000311] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mona Semsarilar
- Institut Européen des Membranes IEM (UMR5635) Université Montpellier CNRS ENSCM CC 047, Université Montpellie 2 place E. Bataillon Montpellier 34095 France
| | - Volker Abetz
- Institut für Physikalische Chemie Grindelallee 117 Universität Hamburg Hamburg 20146 Germany
- Zentrum für Material‐und Küstenforschung GmbH Institut für Polymerforschung Max‐Planck‐Straße 1 Helmholtz‐Zentrum Geesthacht Geesthacht 21502 Germany
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41
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Park NH, Zubarev DY, Hedrick JL, Kiyek V, Corbet C, Lottier S. A Recommender System for Inverse Design of Polycarbonates and Polyesters. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02127] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Nathaniel H. Park
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
| | - Dmitry Yu. Zubarev
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
| | - James L. Hedrick
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
| | - Vivien Kiyek
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
| | - Christiaan Corbet
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
| | - Simon Lottier
- IBM Research−Almaden, 650 Harry Rd., San Jose, California 95120, United States
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42
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Nothling MD, Fu Q, Reyhani A, Allison‐Logan S, Jung K, Zhu J, Kamigaito M, Boyer C, Qiao GG. Progress and Perspectives Beyond Traditional RAFT Polymerization. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001656. [PMID: 33101866 PMCID: PMC7578854 DOI: 10.1002/advs.202001656] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/17/2020] [Indexed: 05/09/2023]
Abstract
The development of advanced materials based on well-defined polymeric architectures is proving to be a highly prosperous research direction across both industry and academia. Controlled radical polymerization techniques are receiving unprecedented attention, with reversible-deactivation chain growth procedures now routinely leveraged to prepare exquisitely precise polymer products. Reversible addition-fragmentation chain transfer (RAFT) polymerization is a powerful protocol within this domain, where the unique chemistry of thiocarbonylthio (TCT) compounds can be harnessed to control radical chain growth of vinyl polymers. With the intense recent focus on RAFT, new strategies for initiation and external control have emerged that are paving the way for preparing well-defined polymers for demanding applications. In this work, the cutting-edge innovations in RAFT that are opening up this technique to a broader suite of materials researchers are explored. Emerging strategies for activating TCTs are surveyed, which are providing access into traditionally challenging environments for reversible-deactivation radical polymerization. The latest advances and future perspectives in applying RAFT-derived polymers are also shared, with the goal to convey the rich potential of RAFT for an ever-expanding range of high-performance applications.
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Affiliation(s)
- Mitchell D. Nothling
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Qiang Fu
- Centre for Technology in Water and Wastewater Treatment (CTWW)School of Civil and Environmental EngineeringUniversity of Technology SydneyUltimoNSW2007Australia
| | - Amin Reyhani
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Stephanie Allison‐Logan
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Kenward Jung
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Jian Zhu
- College of ChemistryChemical Engineering and Material ScienceDepartment of Polymer Science and EngineeringSoochow UniversitySuzhou215123China
| | - Masami Kamigaito
- Department of Molecular and Macromolecular ChemistryGraduate School of EngineeringNagoya UniversityFuro‐cho, Chikusa‐kuNagoya464‐8603Japan
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Greg G. Qiao
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
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Harrier DD, Kenis PJA, Guironnet D. Ring-Opening Polymerization of Cyclic Esters in an Aqueous Dispersion. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Danielle D. Harrier
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Paul J. A. Kenis
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana—Champaign, Urbana, Illinois 61801, United States
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Zaquen N, Rubens M, Corrigan N, Xu J, Zetterlund PB, Boyer C, Junkers T. Polymer Synthesis in Continuous Flow Reactors. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101256] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Vrijsen JH, Rasines Mazo A, Junkers T, Qiao GG. Accelerated Polypeptide Synthesis via
N
‐Carboxyanhydride Ring Opening Polymerization in Continuous Flow. Macromol Rapid Commun 2020; 41:e2000071. [DOI: 10.1002/marc.202000071] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 07/06/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Jeroen Hendrik Vrijsen
- The Polymer Science Group Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
- Organic and (Bio‐)Polymer Chemistry Institute for Materials Research Hasselt University Agoralaan D 3590 Diepenbeek Belgium
| | - Alicia Rasines Mazo
- The Polymer Science Group Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Tanja Junkers
- Organic and (Bio‐)Polymer Chemistry Institute for Materials Research Hasselt University Agoralaan D 3590 Diepenbeek Belgium
- Polymer Reaction Design Group School of Chemistry Monash University Clayton Victoria 3800 Australia
| | - Greg Guanghua Qiao
- The Polymer Science Group Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
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Walsh DJ, Schinski DA, Schneider RA, Guironnet D. General route to design polymer molecular weight distributions through flow chemistry. Nat Commun 2020; 11:3094. [PMID: 32555179 PMCID: PMC7303143 DOI: 10.1038/s41467-020-16874-6] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/28/2020] [Indexed: 01/22/2023] Open
Abstract
The properties of a polymer are known to be intrinsically related to its molecular weight distribution (MWD); however, previous methodologies of MWD control do not use a design and result in arbitrary shaped MWDs. Here we report a precise design to synthesis protocol for producing a targeted MWD design with a simple to use, and chemistry agnostic computer-controlled tubular flow reactor. To support the development of this protocol, we constructed general reactor design rules by combining fluid mechanical principles, polymerization kinetics, and experiments. The ring opening polymerization of lactide, the anionic polymerization of styrene, and the ring opening metathesis polymerization are used as model polymerizations to develop the reactor design rules and synthesize MWD profiles. The derivation of a mathematical model enables the quantitative prediction of the experimental results, and this model provides a tool to explore the limits of any MWD design protocol.
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Affiliation(s)
- Dylan J Walsh
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Devin A Schinski
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Robert A Schneider
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA.
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48
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Shen C, Zheng Q, Shang M, Zha L, Su Y. Using deep learning to recognize liquid–liquid flow patterns in microchannels. AIChE J 2020. [DOI: 10.1002/aic.16260] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Chong Shen
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong University Shanghai China
| | - Qibo Zheng
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong University Shanghai China
| | - Minjing Shang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong University Shanghai China
| | - Li Zha
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong University Shanghai China
| | - Yuanhai Su
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong University Shanghai China
- Key Laboratory of Thin Film and Microfabrication (Ministry of Education)Shanghai Jiao Tong University Shanghai China
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Rolland M, Truong NP, Whitfield R, Anastasaki A. Tailoring Polymer Dispersity in Photoinduced Iron-Catalyzed ATRP. ACS Macro Lett 2020; 9:459-463. [PMID: 35648502 DOI: 10.1021/acsmacrolett.0c00121] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Although dispersity (Đ) plays an important role in controlling polymer properties, there are very few chemical methods that can sufficiently tune it. Here we report a simple, batch, and environmentally benign photoinduced iron-catalyzed ATRP methodology that enables the efficient control of Đ for both homopolymers and block copolymers. We show that by judiciously varying the concentration of the FeBr3/TBABr catalyst, a range of dispersities can be obtained (1.18 < Đ < 1.80) while maintaining monomodal molecular weight distributions. High end-group fidelity was confirmed by MALDI-ToF-MS and was further supported by the efficient synthesis of in situ block copolymers where the dispersity of the second block could be controlled upon demand. Importantly, through the use of low ppm amounts of the catalyst, perfect temporal control could be attained during intermittent "on/off" cycles. This work considerably expands the chemical toolbox for tuning Đ of homo- and block copolymers.
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Affiliation(s)
- Manon Rolland
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich, Switzerland
| | - Nghia P. Truong
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich, Switzerland
| | - Richard Whitfield
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich, Switzerland
| | - Athina Anastasaki
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich, Switzerland
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Reis MH, Leibfarth FA, Pitet LM. Polymerizations in Continuous Flow: Recent Advances in the Synthesis of Diverse Polymeric Materials. ACS Macro Lett 2020; 9:123-133. [PMID: 35638663 DOI: 10.1021/acsmacrolett.9b00933] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The number of reports using continuous flow technology in tubular reactors to perform precision polymerizations has grown enormously in recent years. Flow polymerizations allow highly efficient preparation of polymers exhibiting well-defined molecular characteristics, and has been applied to a slew of monomers and various polymerization mechanisms, including anionic, cationic, radical, and ring-opening. Polymerization conducted in continuous flow offers several distinct advantages, including improved efficiency, reproducibility, and enhanced safety for exothermic polymerizations using highly toxic components, high pressures, and high temperatures. The further development of this technology is thus of relevance for many industrial polymerization processes. While much progress has been demonstrated in recent years, opportunities remain for increasing the compositional and architectural complexity of polymeric materials synthesized in a continuous fashion. Extending the reactor processing principles that have heretofore been focused on optimizing homopolymerization to include multisegment block copolymers, particularly from monomers that propagate via incompatible mechanisms, represents a major challenge and coveted target for continuous flow polymerization. Likewise, the spatial and temporal control of reactivity afforded by flow chemistry has and will continue to enable the production of complex polymeric architectures. This Viewpoint offers a brief background of continuous flow polymerization focused primarily on tubular (micro)reactors and includes selected examples that are relevant to these specific developments.
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Affiliation(s)
- Marcus H. Reis
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Frank A. Leibfarth
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Louis M. Pitet
- Advanced Polymer Functionalization Group, Institute for Materials Research (IMO), Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
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