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Click chemistry strategies for the accelerated synthesis of functional macromolecules. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210126] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Cheawchan S, Sogawa H, Takata T. Phototriggered Crosslinking and Surface Modification via Catalyst‐Free Functionalization of a New Orthogonal Agent Containing Nitrile
N
‐Oxide and
o
‐Nitrobenzyl Ether Moieties. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202000459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sumitra Cheawchan
- Department of Organic and Polymeric Materials Tokyo Institute of Technology 2‐12‐1, Ookayama Meguro Tokyo 152–8552 Japan
| | - Hiromitsu Sogawa
- Department of Organic and Polymeric Materials Tokyo Institute of Technology 2‐12‐1, Ookayama Meguro Tokyo 152–8552 Japan
- Department of Chemistry and Materials Engineering Faculty of Chemistry Materials and Bioengineering Kansai University Suita Osaka 564–8680 Japan
| | - Toshikazu Takata
- Department of Organic and Polymeric Materials Tokyo Institute of Technology 2‐12‐1, Ookayama Meguro Tokyo 152–8552 Japan
- Graduate School of Advanced Science and Engineering Hiroshima University Kagamiyama Higashi‐Hiroshima Hiroshima 739–8527 Japan
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Sogawa H, Tsutsuba T, Sakiyama N, Ikeda T, Takata T. Rotaxane-Based Difunctional Nitrile N-Oxide Crosslinker: Synthesis and Direct Introduction of Movable Crosslinking Points into Ethylene-Propylene-Butadiene Monomer (EPDM) Rubber. Macromol Rapid Commun 2020; 42:e2000639. [PMID: 33326129 DOI: 10.1002/marc.202000639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/19/2020] [Indexed: 11/06/2022]
Abstract
Incorporation of rotaxane scaffolds into the crosslinking points of polymer networks significantly affects their rheological and mechanical properties. The present study involves the synthesis of a new rotaxane-type crosslinker containing nitrile N-oxide functional groups on both the axle and wheel components. The prepared crosslinker is highly reactive; however, it can be isolated and applied in the crosslinking reaction of a commercially important polymer, namely ethylene-propylene-butadiene monomer rubber (EPDM), in the absence of additives and catalysts. Tensile tests reveal that compared to a network containing conventional crosslinking points, both breaking strength and strain of the network structure prepared herein are improved due to the incorporation of movable crosslinking points. The synthesized network structure also exhibits five times higher fracture energy. The developed post-crosslinking methodology for the direct introduction of movable crosslinking points into pre-formed polymers will be valuable in the production of rotaxane materials for various applications.
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Affiliation(s)
- Hiromitsu Sogawa
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan.,Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka, 564-8680, Japan
| | - Toyokazu Tsutsuba
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Naoto Sakiyama
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Tatsuhito Ikeda
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Toshikazu Takata
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552, Japan.,Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
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Nitrile N-oxide-terminated poly(γ-benzyl l-glutamate) (PBLG): synthesis and catalyst-free grafting onto polybutadiene (PBD) and natural rubber (NR). Polym J 2020. [DOI: 10.1038/s41428-020-0370-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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