1
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Kim K, Nguyen D, Strong J, Dadashi-Silab S, Sun M, Dau H, Keyes A, Yin R, Harth E, Matyjaszewski K. Block Copolymers of Polyolefins with Polyacrylates: Analyzing and Improving the Blocking Efficiencies Using MILRad/ATRP Approach. Macromol Rapid Commun 2024; 45:e2300675. [PMID: 38163327 DOI: 10.1002/marc.202300675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Despite their industrial ubiquity, polyolefin-polyacrylate block copolymers are challenging to synthesize due to the distinct polymerization pathways necessary for respective blocks. This study utilizes MILRad, metal-organic insertion light-initiated radical polymerization, to synthesize polyolefin-b-poly(methyl acrylate) copolymer by combining palladium-catalyzed insertion-coordination polymerization and atom transfer radical polymerization (ATRP). Brookhart-type Pd complexes used for the living polymerization of olefins are homolytically cleaved by blue-light irradiation, generating polyolefin-based macroradicals, which are trapped with functional nitroxide derivatives forming ATRP macroinitiators. ATRP in the presence of Cu(0), that is, supplemental activators and reducing agents , is used to polymerize methyl acrylate. An increase in the functionalization efficiency of up to 71% is demonstrated in this study by modifying the light source and optimizing the radical trapping condition. Regardless of the radical trapping efficiency, essentially quantitative chain extension of polyolefin-Br macroinitiator with acrylates is consistently demonstrated, indicating successful second block formation.
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Affiliation(s)
- Khidong Kim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Dung Nguyen
- Department of Chemistry, Center of Excellence in Polymer Chemistry (CEPC), University of Houston, Houston, TX, 77204, USA
| | - Jacobo Strong
- Department of Chemistry, Center of Excellence in Polymer Chemistry (CEPC), University of Houston, Houston, TX, 77204, USA
| | | | - Mingkang Sun
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Huong Dau
- Department of Chemistry, Center of Excellence in Polymer Chemistry (CEPC), University of Houston, Houston, TX, 77204, USA
| | - Anthony Keyes
- Department of Chemistry, Center of Excellence in Polymer Chemistry (CEPC), University of Houston, Houston, TX, 77204, USA
| | - Rongguan Yin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Eva Harth
- Department of Chemistry, Center of Excellence in Polymer Chemistry (CEPC), University of Houston, Houston, TX, 77204, USA
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2
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Li Z, Feng W, Zhang X, Xu B, Wang L, Lin S. Self-assembly of amphiphilic asymmetric comb-like copolymers with responsive rigid side chains. SOFT MATTER 2024; 20:2823-2830. [PMID: 38451223 DOI: 10.1039/d4sm00076e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Amphiphilic asymmetric comb-like copolymers (AACCs) exhibit distinct self-assembly behaviours due to their unique architecture. However, the synthetic difficulties of well-defined AACCs have prohibited a systematic understanding of the architecture-morphology relationship. In this work, we conducted dissipative particle dynamics simulations to investigate the self-assembly behaviours of AACCs with responsive rigid side chains in selective solvents. The effects of side chain length, number of branches, and spacers on the morphology of aggregates were investigated by mapping out morphology diagrams. Besides, the numbers and surface areas of aggregates clearly depicted the morphological transitions during the self-assembly process. Moreover, the rod-to-coil conformation transitions were simulated to explore the stimuli-responsive behaviour of the AACCs with responsive rigid side chains by adjusting the bond angle parameter of the rigid chains. The results indicated that without the support of the rigid chains, the assembly structure collapsed, leading to the tube-to-channelized micelles and one-compartment-to-multicompartment vesicle morphology transformations. The simulation results are consistent with earlier experimental results, which can provide theoretical guidance for assembly toward desired nanostructures.
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Affiliation(s)
- Zhengyi Li
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Weisheng Feng
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Xing Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Binbin Xu
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Liquan Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
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3
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Xue Y, Song Q, Liu Y, Smith D, Li W, Zhong M. Hierarchically Structured Nanocomposites via Mixed-Graft Block Copolymer Templating: Achieving Controlled Nanostructure and Functionality. J Am Chem Soc 2024; 146:567-577. [PMID: 38117946 DOI: 10.1021/jacs.3c10297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Integrating inorganic and polymerized organic functionalities to create composite materials presents an efficient strategy for the discovery and fabrication of multifunctional materials. The characteristics of these composites go beyond a simple sum of individual component properties; they are profoundly influenced by the spatial arrangement of these components and the resulting homo-/hetero-interactions. In this work, we develop a facile and highly adaptable approach for crafting nanostructured polymer-inorganic composites, leveraging hierarchically assembling mixed-graft block copolymers (mGBCPs) as templates. These mGBCPs, composed of diverse polymeric side chains that are covalently tethered with a defined sequence to a linear backbone polymer, self-assemble into ordered hierarchical structures with independently tuned nano- and mesoscale lattice features. Through the coassembly of mGBCPs with diversely sized inorganic fillers such as metal ions (ca. 0.1 nm), metal oxide clusters (0.5-2 nm), and metallic nanoparticles (>2 nm), we create three-dimensional filler arrays with controlled interfiller separation and arrangement. Multiple types of inorganic fillers are simultaneously integrated into the mGBCP matrix by introducing orthogonal interactions between distinct fillers and mGBCP side chains. This results in nanocomposites where each type of filler is selectively segregated into specific nanodomains with matrix-defined orientations. The developed coassembly strategy offers a versatile and scalable pathway for hierarchically structured nanocomposites, unlocking new possibilities for advanced materials in the fields of optoelectronics, sensing, and catalysis.
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Affiliation(s)
- Yazhen Xue
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Qingliang Song
- State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yuchu Liu
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Daniel Smith
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Weihua Li
- State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Mingjiang Zhong
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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4
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Xue Y, Cao M, Chen C, Zhong M. Design of Microstructure-Engineered Polymers for Energy and Environmental Conservation. JACS AU 2023; 3:1284-1300. [PMID: 37234122 PMCID: PMC10207122 DOI: 10.1021/jacsau.3c00081] [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: 02/16/2023] [Revised: 04/17/2023] [Accepted: 04/17/2023] [Indexed: 05/27/2023]
Abstract
With the ever-growing demand for sustainability, designing polymeric materials using readily accessible feedstocks provides potential solutions to address the challenges in energy and environmental conservation. Complementing the prevailing strategy of varying chemical composition, engineering microstructures of polymer chains by precisely controlling their chain length distribution, main chain regio-/stereoregularity, monomer or segment sequence, and architecture creates a powerful toolbox to rapidly access diversified material properties. In this Perspective, we lay out recent advances in utilizing appropriately designed polymers in a wide range of applications such as plastic recycling, water purification, and solar energy storage and conversion. With decoupled structural parameters, these studies have established various microstructure-function relationships. Given the progress outlined here, we envision that the microstructure-engineering strategy will accelerate the design and optimization of polymeric materials to meet sustainability criteria.
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Affiliation(s)
- Yazhen Xue
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Mengxue Cao
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Charles Chen
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Mingjiang Zhong
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
- Department
of Chemistry, Yale University, New Haven, Connecticut 06511, United States
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5
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Liang R, Song Q, Li R, Le AN, Fu X, Xue Y, Ji X, Li W, Zhong M. Rapid Access to Diverse Multicomponent Hierarchical Nanostructures from Mixed‐Graft Block Copolymers. Angew Chem Int Ed Engl 2022; 61:e202210067. [DOI: 10.1002/anie.202210067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Ruiqi Liang
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
| | - Qingliang Song
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Ruipeng Li
- National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA
| | - An N. Le
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
| | - Xiaowei Fu
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Yazhen Xue
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
| | - Xiaoyu Ji
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
| | - Weihua Li
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Mingjiang Zhong
- Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA
- Department of Chemistry Yale University New Haven CT 06520 USA
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6
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Liang R, Song Q, Li R, Le AN, Fu X, Xue Y, Ji X, Li W, Zhong M. Rapid Access to Diverse Multicomponent Hierarchical Nanostructures from Mixed‐Graft Block Copolymers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ruiqi Liang
- Yale University Department of Chemical and Environmental Engineering UNITED STATES
| | - Qingliang Song
- Fudan University Department of Macromolecular Science CHINA
| | - Ruipeng Li
- Brookhaven National Laboratory National Synchrotron Light Source II UNITED STATES
| | - An N. Le
- Yale University Department of Chemical and Environmental Engineering UNITED STATES
| | - Xiaowei Fu
- Yale University Department of Chemical and Environmental Engineering UNITED STATES
| | - Yazhen Xue
- Yale University Department of Chemical and Environmental Engineering UNITED STATES
| | - Xiaoyu Ji
- Yale University Department of Chemical and Environmental Engineering UNITED STATES
| | - Weihua Li
- Fudan University Department of Macromolecular Science CHINA
| | - Mingjiang Zhong
- Yale University Department of Chemical and Environmental Engineering 17 Hillhouse Ave Room 422 06511 New Haven UNITED STATES
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7
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Conformational characteristics of regioselectively PEG/PS-grafted cellulosic bottlebrushes in solution: cross-sectional structure and main-chain stiffness. Polym J 2022. [DOI: 10.1038/s41428-021-00594-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8
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Mei G, Zheng Y, Fu Y, Huo M. Polymerization-induced self-assembly of random bottlebrush copolymers. Polym Chem 2022. [DOI: 10.1039/d2py00858k] [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
Bottlebrush polymers have shown unique self-assembly behaviors, providing an access to hierarchical nanoparticles with a precise structure and tailorable function. However, the self-assembly pattern of random bottlebrush copolymers (random BBCPs)...
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9
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Le AN, Liang R, Ji X, Fu X, Zhong M. Random copolymerization of macromonomers as a versatile strategy to synthesize mixed‐graft block copolymers. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210407] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- An N. Le
- Department of Chemical and Environmental Engineering Yale University New Haven Connecticut USA
| | - Ruiqi Liang
- Department of Chemical and Environmental Engineering Yale University New Haven Connecticut USA
| | - Xiaoyu Ji
- Department of Chemical and Environmental Engineering Yale University New Haven Connecticut USA
| | - Xiaowei Fu
- Department of Chemical and Environmental Engineering Yale University New Haven Connecticut USA
| | - Mingjiang Zhong
- Department of Chemical and Environmental Engineering Yale University New Haven Connecticut USA
- Department of Chemistry Yale University New Haven Connecticut USA
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10
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Mei H, Mahalik JP, Lee D, Laws TS, Terlier T, Stein GE, Kumar R, Verduzco R. Understanding interfacial segregation in polymer blend films with random and mixed side chain bottlebrush copolymer additives. SOFT MATTER 2021; 17:9028-9039. [PMID: 34523659 DOI: 10.1039/d1sm01146d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bottlebrush polymers are complex macromolecules with tunable physical properties dependent on the chemistry and architecture of both the side chains and the backbone. Prior work has demonstrated that bottlebrush polymer additives can be used to control the interfacial properties of blends with linear polymers but has not specifically addressed the effects of bottlebrush side chain microstructures. Here, using a combination of experiments and self-consistent field theory (SCFT) simulations, we investigated the effects of side chain microstructures by comparing the segregation of bottlebrush additives having random copolymer side chains with bottlebrush additives having a mixture of two different homopolymer side chain chemistries. Specifically, we synthesized bottlebrush polymers with either poly(styrene-ran-methyl methacrylate) side chains or with a mixture of polystyrene (PS) and poly(methyl methacrylate) (PMMA) side chains. The bottlebrush additives were matched in terms of PS and PMMA compositions, and they were blended with linear PS or PMMA chains that ranged in length from shorter to longer than the bottlebrush side chains. Experiments revealed similar behaviors of the two types of bottlebrushes, with a slight preference for mixed side-chain bottlebrushes at the film surface. SCFT simulations were qualitatively consistent with experimental observations, predicting only slight differences in the segregation of bottlebrush additives driven by side chain microstructures. Specifically, these slight differences were driven by the chemistries of the bottlebrush polymer joints and side chain end-groups, which were entropically repelled and attracted to interfaces, respectively. Using SCFT, we also demonstrated that the interfacial behaviors were dominated by entropic effects with high molecular weight linear polymers, leading to enrichment of bottlebrush near interfaces. Surprisingly, the SCFT simulations showed that the chemistry of the joints connecting the bottlebrush backbones and side chains played a more significant role compared with the side chain end groups in affecting differences in surface excess of bottlebrushes with random and mixed side chains. This work provides new insights into the effects of side chain microstructure on segregation of bottlebrush polymer additives.
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Affiliation(s)
- Hao Mei
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005, USA.
| | - Jyoti P Mahalik
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003, USA
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.
| | - Dongjoo Lee
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005, USA.
| | - Travis S Laws
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Tanguy Terlier
- SIMS Lab, Shared Equipment Authority, Rice University, Houston, TX 77005, USA
| | - Gila E Stein
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Rajeev Kumar
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.
| | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005, USA.
- Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA
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11
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Zhao P, Deng M, Yang Y, Zhang J, Zhang Y. Synthesis and Self-Assembly of Thermoresponsive Biohybrid Graft Copolymers Based on a Combination of Passerini Multicomponent Reaction and Molecular Recognition. Macromol Rapid Commun 2021; 42:e2100424. [PMID: 34505724 DOI: 10.1002/marc.202100424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/07/2021] [Indexed: 12/25/2022]
Abstract
Amphiphilic graft copolymers exhibit fascinating self-assembly behaviors. Their molecular architectures significantly affect the morphology and functionality of the self-assemblies. Considering the potential application of amphiphilic graft copolymers in the fabrication of nanocarriers, it is essential to synthesize well-defined graft copolymers with desired functional groups. Herein, the Passerini reaction and molecular recognition are introduced to the synthesis of functional thermoresponsive graft copolymers. A bifunctional monomer 2-((adamantan-1-yl)amino)-1-(4-((2-bromo-2-methylpropanoyl)oxy)phenyl)-2-oxoethyl methacrylate (ABMA) with a bromo group for atom transfer radical polymerization (ATRP) and an adamantyl group for molecular recognition is synthesized through the Passerini reaction. The graft copolymers are prepared by reversible addition-fragmentation transfer (RAFT) copolymerization of ABMA and oligo(ethylene glycol) methyl ether methacrylate (OEGMA) followed by RAFT end group removal and ATRP of di(ethylene glycol)methyl ether methacrylate (DEGMA) initiated by the ABMA units. The graft copolymer P(OEGMA-co-ABMA)-g-PDEGMA can be functionalized with β-cyclodextrin modified peptides, affording a thermoresponsive biohybrid graft copolymer. At a temperature above its lower critical solution temperature, the biohybrid graft copolymer self-assembles into peptide-modified polymersomes.
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Affiliation(s)
- Peiqiong Zhao
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Meigui Deng
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Yongfang Yang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Jimin Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Yue Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
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12
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Xu B, Qian H, Zhang L, Lin S. Branched Aggregates with Tunable Morphology via Hierarchical Self‐Assembly of Azobenzene‐Derived Molecular Double Brushes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Binbin Xu
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Hongyu Qian
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Ling Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
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13
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Xu B, Qian H, Zhang L, Lin S. Branched Aggregates with Tunable Morphology via Hierarchical Self-Assembly of Azobenzene-Derived Molecular Double Brushes. Angew Chem Int Ed Engl 2021; 60:17707-17713. [PMID: 34075671 DOI: 10.1002/anie.202106321] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Indexed: 11/10/2022]
Abstract
Hierarchical self-assembly is one of the most effective approaches to fabricate nature-inspired materials with subtle nanostructures. We report a distinct hierarchical self-assembly process of molecular double brushes (MDBs) with each graft site carrying a poly(azobenzene-acrylate) (PAzo) chain and a poly(ethylene oxide) (PEO) chain. Asymmetric tapered worm (ATW) nanostructures with chain-end reactivity assembling from the azobenzene-derived MDBs serve as primary subunits to prepare branched supermicelles by increasing water content (Cw ) in THF/water. Various natural Antedon-shaped multiarm worm-like aggregates (MWAs) can be created via the particle-particle connection of ATWs. Intriguingly, the azobenzene moieties undergo trans-cis isomerization upon UV irradiation and further promote a morphology evolution of MWAs. Multiscale supermicelles comprised of starfish shapes with differing central body and arm morphologies (e.g., compare to the biological specimens Luidia ciliaris and Crossaster papposus) were prepared by manipulating irradiation time.
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Affiliation(s)
- Binbin Xu
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Hongyu Qian
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Ling Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
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14
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15
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Liu R, Rong Z, Han G, Yang X, Zhang W. Synthesis and self-assembly of star multiple block copolymer of poly(4-vinylpyridine)-block-polystyrene. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Filatov DA, Govorun EN. Microphase separation in the melts of diblock copolymers with amphiphilic blocks. SOFT MATTER 2021; 17:90-101. [PMID: 33150920 DOI: 10.1039/d0sm01089h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Self-assembly of graft diblock copolymers is an actual topic in the development of materials with desirable properties. In the paper, microphase separation in a melt of the diblock copolymer with amphiphilic and non-amphiphilic blocks is investigated using the analytical theory in the strong segregation approximation. Non-amphiphilic blocks are strongly immiscible with the backbone chains of amphiphilic ones but miscible with their side chains. In the theory, the amphiphilic units are considered as dimers, which can easily orient at interfaces. In the case of weakly amphiphilic dimers, the interfacial tension at a flat interface is calculated using density-functional theory. The amphiphilicity effect leads to a decrease in the surface tension and, hence, to weakening of the block stretching and decrease of the spatial period of the structure. In the case of strongly amphiphilic dimers, the phase diagrams are calculated taking into account basic morphological types (spheres and inverse spheres of amphiphilic blocks, cylinders and inverse cylinders, and lamellae). If the amphiphilicity effects dominate, the characteristic size of the amphiphilic block domain is equal to the side chain length, spherical and cylindrical micelles are formed only at very low fractions of the amphiphilic blocks, the lamellae are formed at slightly larger factions, and the micelles from non-amphiphilic blocks are separated by thin interconnected layers from amphiphilic blocks in the broad range of compositions.
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Affiliation(s)
- Dmitry A Filatov
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova ul. 28, Moscow 119991, Russia
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17
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Ribeiro AH, Haven J, Buckinx AL, Beuchel M, Philipps K, Junkers T, Michels JJ. Direct synthesis of light-emitting triblock copolymers from RAFT polymerization. Polym Chem 2021. [DOI: 10.1039/d0py01358g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We introduce a straightforward and clean method to synthesize semiconducting triblockcopolymers (tri-BCPs) using RAFT polymerization.
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Affiliation(s)
| | - Joris Haven
- Polymer Reaction Design Group
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Axel-Laurenz Buckinx
- Polymer Reaction Design Group
- School of Chemistry
- Monash University
- Clayton
- Australia
| | | | - Kai Philipps
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Tanja Junkers
- Polymer Reaction Design Group
- School of Chemistry
- Monash University
- Clayton
- Australia
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18
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Martinez MR, Krys P, Sheiko SS, Matyjaszewski K. Poor Solvents Improve Yield of Grafting-Through Radical Polymerization of OEO 19MA. ACS Macro Lett 2020; 9:674-679. [PMID: 35648572 DOI: 10.1021/acsmacrolett.0c00245] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Radical polymerization of poly(ethylene glycol) methyl ether methacrylate (OEO19MA, Mn ∼ 950) at an initial monomer concentration of 150 mM was investigated as a function of solvent composition. Conventional and controlled radical polymerizations in anisole at 60 °C converged at approximately the same equilibrium monomer concentration ([M]eq) of ∼38 mM, suggesting that livingness or diminished termination did not affect the thermodynamic parameters of polymerization. Conventional radical polymerizations (RPs) in anisole, dimethylformamide (DMF), toluene, and 1×PBS buffered water were taken to approximately 98% thermal initiator decomposition to determine [M]eq at reaction completion within a broad temperature range. The enthalpy (ΔHp) and entropy (ΔSp°) of polymerization were solvent-dependent. Polymerizations in 1×PBS were the most thermodynamically favorable, followed by those in DMF, toluene, and anisole. -ΔHp and -ΔSp increased with the square of the difference in the Hansen solubility parameters of poly(ethylene glycol) and the solvent. It is proposed that poor solvents favor polymer-polymer interactions over polymer-solvent interactions, which improves the thermodynamic polymerizability.
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Affiliation(s)
- Michael R Martinez
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Pawel Krys
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sergei S Sheiko
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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Levi AE, Fu L, Lequieu J, Horne JD, Blankenship J, Mukherjee S, Zhang T, Fredrickson GH, Gutekunst WR, Bates CM. Efficient Synthesis of Asymmetric Miktoarm Star Polymers. Macromolecules 2020; 53:702-710. [PMID: 32489220 PMCID: PMC7266137 DOI: 10.1021/acs.macromol.9b02380] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Asymmetric miktoarm star polymers comprising an unequal number of chemically-distinct blocks connected at a common junction produce unique material properties, yet existing synthetic strategies are beleaguered by complicated reaction schemes that are restricted in both monomer scope and yield. Here, we introduce a new synthetic approach coined "μSTAR" - Miktoarm Synthesis by Termination After Ring-opening metathesis polymerization - that circumvents these traditional synthetic limitations by constructing the block-block junction in a scalable, one-pot process involving (1) grafting-through polymerization of a macromonomer followed by (2) in-situ enyne-mediated termination to install a single mikto-arm with exceptional efficiency. This modular μSTAR platform cleanly generates AB n and A(BA') n miktoarm star polymers with unprecedented versatility in the selection of A and B chemistries as demonstrated using many common polymer building blocks: poly(siloxane), poly(acrylate), poly(methacrylate), poly(ether), poly(ester), and poly(styrene). The average number of B or BA' arms (n) is easily controlled by the molar equivalents of macromonomer relative to Grubbs catalyst in the initial ring-opening metathesis polymerization step. While these materials are characterized by dispersity in n that arises from polymerization statistics, they self-assemble into mesophases that are identical to those predicted for precise miktoarm stars as evidenced by small-angle X-ray scattering experiments and self-consistent field theory simulations. In summary, the μSTAR technique provides a significant boost in design flexibility and synthetic simplicity while retaining the salient phase behavior of precise miktoarm star materials.
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Affiliation(s)
- Adam E. Levi
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Liangbing Fu
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332, United States
| | - Joshua Lequieu
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Jacob D. Horne
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Jacob Blankenship
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Sanjoy Mukherjee
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Tianqi Zhang
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332, United States
| | - Glenn H. Fredrickson
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Will R. Gutekunst
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332, United States
| | - Christopher M. Bates
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
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20
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Fu X, Guo ZH, Le AN, Lei J, Zhong M. Synthesis and visualization of molecular brush- on-brush based hierarchically branched structures. Polym Chem 2020. [DOI: 10.1039/c9py01075k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An atom transfer radical polymerization-mediated sequential “graft-from” approach was developed to synthesize molecular brush-on-brush (MBoB)-based hierarchically branched polymers with readily tunable structural parameters.
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Affiliation(s)
- Xiaowei Fu
- Department of Chemical and Environmental Engineering
- Yale University
- New Haven
- USA
- State Key Laboratory of Polymer Materials Engineering
| | - Zi-Hao Guo
- Department of Chemical and Environmental Engineering
- Yale University
- New Haven
- USA
- South China Advanced Institute for Soft Matter Science and Technology
| | - An N. Le
- Department of Chemical and Environmental Engineering
- Yale University
- New Haven
- USA
| | - Jingxin Lei
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- China
| | - Mingjiang Zhong
- Department of Chemical and Environmental Engineering
- Yale University
- New Haven
- USA
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