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Sadat Afi Kheljani S, Didehban K, Atai M, Zou C, Ahmadjo S, Rodríguez-Pizarro M, Bahri-Laleh N, Poater A. In-situ photo-crosslinkable elastomer based on polyalphaolefin/halloysite nanohybrid. J Colloid Interface Sci 2024; 659:751-766. [PMID: 38211492 DOI: 10.1016/j.jcis.2023.12.185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/17/2023] [Accepted: 12/30/2023] [Indexed: 01/13/2024]
Abstract
In this research, new injectable and in situ photocurable elastomeric nanohybrids have been fabricated from polyalphaolefin (PAO) resins and halloysite nanofiller. In this regard, the co-oligomerization of long α-olefin monomers (C6, C8 and C10) with alkenol counterparts was carried out via a simple cationic route to provide OH-functionalized PAOs. The newly formed PAO type copolymer resins as well as halloysite nanoclay were then equipped with photocurable CC bonds containing an acrylate moiety. After the characterization of the final chemical substances and also of the intermediate structures, experimentally and computationally by means of Density Functional Theory (DFT) calculations, the neat treated PAO and PAO/halloysite nanohybrids were subjected to a curing process by visible light irradiation (λ ∼ 475 nm, blue light). The crosslinking efficiency of the neat resins and the formed nanohybrid was evaluated using shrinkage strain-time curves and equilibrium swelling method. The suggested nanohybrid is not only biocompatible (96 % in the MTT assay), and hydrophilic (with a water contact angle of 61°), but also exhibits an easy, fast and robust curing process with great potential for coating and sealing technologies for medical devices.
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Affiliation(s)
| | - Khadijeh Didehban
- Department of Chemistry, Payame Noor University, P.O. Box 19395-36972 Tehran, Iran
| | - Mohammad Atai
- Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115 Tehran, Iran
| | - Chen Zou
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Saeid Ahmadjo
- Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115 Tehran, Iran
| | - Montserrat Rodríguez-Pizarro
- Departament de Química, Institut de Química Computacional i Catàlisi, Universitat de Girona, c/ Mª Aurèlia Capmany 69, Girona, Catalonia 17003, Spain
| | - Naeimeh Bahri-Laleh
- Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115 Tehran, Iran; Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM(2)), Hiroshima University, Hiroshima 739-8526, Japan.
| | - Albert Poater
- Departament de Química, Institut de Química Computacional i Catàlisi, Universitat de Girona, c/ Mª Aurèlia Capmany 69, Girona, Catalonia 17003, Spain.
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Jang YJ, Nguyen S, Hillmyer MA. Chemically Recyclable Linear and Branched Polyethylenes Synthesized from Stoichiometrically Self-Balanced Telechelic Polyethylenes. J Am Chem Soc 2024; 146:4771-4782. [PMID: 38323928 DOI: 10.1021/jacs.3c12660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
High-density polyethylene (HDPE) is a widely used commercial plastic due to its excellent mechanical properties, chemical resistance, and water vapor barrier properties. However, less than 10% of HDPE is mechanically recycled, and the chemical recycling of HDPE is challenging due to the inherent strength of the carbon-carbon backbone bonds. Here, we report chemically recyclable linear and branched HDPE with sparse backbone ester groups synthesized from the transesterification of telechelic polyethylene macromonomers. Stoichiometrically self-balanced telechelic polyethylenes underwent transesterification polymerization to produce the PE-ester samples with high number-average molar masses of up to 111 kg/mol. Moreover, the transesterification polymerization of the telechelic polyethylenes and the multifunctional diethyl 5-(hydroxymethyl)isophthalate generated branched PE-esters. Thermal and mechanical properties of the PE-esters were comparable to those of commercial HDPE and tunable through control of the ester content in the backbone. In addition, branched PE-esters showed higher levels of melt strain hardening compared with linear versions. The PE-ester was depolymerized into telechelic macromonomers through straightforward methanolysis, and the resulting macromonomers could be effectively repolymerized to generate a high molar mass recycled PE-ester sample. This is a new and promising method for synthesizing and recycling high-molar-mass linear and branched PE-esters, which are competitive with HDPE and have easily tailorable properties.
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Affiliation(s)
- Yoon-Jung Jang
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Sam Nguyen
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Marc A Hillmyer
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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3
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Sample CS, Kellstedt EA, Hillmyer MA. Tandem ROMP/Hydrogenation Approach to Hydroxy-Telechelic Linear Polyethylene. ACS Macro Lett 2022; 11:608-614. [PMID: 35570818 DOI: 10.1021/acsmacrolett.2c00144] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydroxy-telechelic polyalkenamers have long been synthesized using ring-opening metathesis polymerization (ROMP) in the presence of an acyclic olefin chain-transfer agent (CTA); however, this route typically requires protected diols in the CTA due to the challenge of alcohol-mediated degradation of ruthenium metathesis catalysts that can not only deactivate the catalysts, but also compromise the CTA. We demonstrate the synthesis and implementation of a new hydroxyl-containing CTA in which extended methylene spacers isolate the olefin and alcohol moieties to mitigate decomposition pathways. This CTA enabled the direct ROMP synthesis of hydroxy-telechelic polycyclooctene with controlled chain lengths dictated by the initial ratio of monomer to CTA. The elimination of protection/deprotection steps resulted in improved atom economy. Subsequent hydrogenation of the backbone olefins was performed by a one-pot, catalytic approach employing the ruthenium complex used for the initial ROMP. The resultant approach is a streamlined, atom-economic, and low-waste route to hydroxy-telechelic linear polyethylene that uses a green solvent, succeeds with miniscule quantities of catalyst (0.005 mol %), and requires no additional purification steps.
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Affiliation(s)
- Caitlin S. Sample
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Elizabeth A. Kellstedt
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Marc A. Hillmyer
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
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Abstract
A comprehensive review of all the methodologies developed for the synthesis of telechelic polyolefins is reported.
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Affiliation(s)
- Tianwei Yan
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, USA
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, USA
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA
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Wolf WJ, Li J, Jones SC, Stoltz BM, Grubbs RH. An Efficient Synthesis of Geminal-Dialkyl Dienes for Olefin Metathesis Polymerization. Macromolecules 2020; 53:7803-7809. [PMID: 34305177 PMCID: PMC8297823 DOI: 10.1021/acs.macromol.0c01606] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A robust synthesis of gem-dialkyl acyclic diene monomers has been developed. This route is scalable, flexible, and biorenewable, allowing for the production of a wide range of diene monomers of different lengths and different gem-dialkyl substitution starting from unsaturated esters derived from seed oils. The metathesis polymerization of these monomers and the hydrogenation of the resulting polyolefins leads to telechelic gem-dialkyl polyethylenes, which can be used as elastomers in the synthesis of polyurethanes and other block polymers.
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Affiliation(s)
- William J. Wolf
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jiaming Li
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Simon C. Jones
- Electrochemical Technologies Group, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, United States
| | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 101-20, Pasadena, California 91125, United States
| | - Robert H. Grubbs
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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Topa M, Hola E, Galek M, Petko F, Pilch M, Popielarz R, Morlet-Savary F, Graff B, Lalevée J, Ortyl J. One-component cationic photoinitiators based on coumarin scaffold iodonium salts as highly sensitive photoacid generators for 3D printing IPN photopolymers under visible LED sources. Polym Chem 2020. [DOI: 10.1039/d0py00677g] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This paper describes the development of new coumarin chromophore-based iodonium salts as efficient one-component cationic photoinitiators upon LEDs irradiation with maximum emission under the UV-A region at 365 nm and under visible light at 405 nm.
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Affiliation(s)
- Monika Topa
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Cracow
- Poland
| | - Emilia Hola
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Cracow
- Poland
| | | | | | - Maciej Pilch
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Cracow
- Poland
| | - Roman Popielarz
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Cracow
- Poland
| | - Fabrice Morlet-Savary
- Institut de Science des Matériaux de Mulhouse IS2 M
- UMR CNRS 7361
- Cedex 68057 Mulhouse
- France
| | - Bernadette Graff
- Institut de Science des Matériaux de Mulhouse IS2 M
- UMR CNRS 7361
- Cedex 68057 Mulhouse
- France
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2 M
- UMR CNRS 7361
- Cedex 68057 Mulhouse
- France
| | - Joanna Ortyl
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 31-155 Cracow
- Poland
- Photo HiTech Ltd
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