a.Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China
b.Shandong Chambroad Sinopoly New Materials Co., Ltd., Binzhou 256600, China
shiyan@mail.buct.edu.cn (Y.S.)
zhanglq@mail.buct.edu.cn (L.Q.Z.)
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Gao, H.; Cui, B.C.; Zheng, H. B.; Hao, F. L.; Shi, Y.; Zhang, L. Q. Epoxidation functionalized isobutylene isoprene rubber toward green-curing pathway and high-performance composites. Chinese J. Polym. Sci. 2023, 41, 1818–1828
Han Gao, Bai-Chuan Cui, Hong-Bing Zheng, et al. Epoxidation Functionalized Isobutylene Isoprene Rubber toward Green-curing Pathway and High-performance Composites[J]. Chinese Journal of Polymer Science, 2023,41(11):1818-1828.
Gao, H.; Cui, B.C.; Zheng, H. B.; Hao, F. L.; Shi, Y.; Zhang, L. Q. Epoxidation functionalized isobutylene isoprene rubber toward green-curing pathway and high-performance composites. Chinese J. Polym. Sci. 2023, 41, 1818–1828 DOI: 10.1007/s10118-023-2986-3.
Han Gao, Bai-Chuan Cui, Hong-Bing Zheng, et al. Epoxidation Functionalized Isobutylene Isoprene Rubber toward Green-curing Pathway and High-performance Composites[J]. Chinese Journal of Polymer Science, 2023,41(11):1818-1828. DOI: 10.1007/s10118-023-2986-3.
A new modified species of butyl rubber (IIR), epoxidized butyl rubber (EIIR) was synthesized by ,in situ, epoxidation technique for the first time. The epoxidation degree of EIIR reached about 99 %. The EIIR/CB composite crosslinked by maleic anhydride had excellent mechanical properties, and the airtightness and fatigue life were substantially improved compared with those of IIR.
Epoxidation of the carbon-carbon double bonds on unsaturated rubber macromolecules can produce novel modified rubber species with special properties, and construct eco-friendly crosslinking pathway ,via, the reaction of epoxide groups to solve the problems brought by conventional sulfur vulcanization system. In this contribution, a novel modified product of isobutylene isoprene rubber (IIR), epoxy-functionalized IIR (EIIR) was successfully prepared by ,in situ, epoxidation technique for the first time, and the crosslinking of EIIR was achieved by the reaction of oxirane groups with maleic anhydride (MAH) without additional additives. The reaction conditions for preparing EIIR were optimized through systematic research on the epoxidation process. Under optimal condition, the degree of epoxidation of the rubber reached around 99% without side reactions. The obtained EIIR/carbon black composites cured by MAH had excellent mechanical properties comparable to those of IIR composites. More importantly, compared with IIR composites, the air-tightness of the EIIR composites was improved by about 50%, and the flexural fatigue life of first-level cracks and sixth-level cracks was increased by several times. The significant improvement of these properties is of great significance for the application safety and energy saving of IIR materials.
IIREpoxy functionalizationAir-tightnessFatigue failure resistance
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