Epoxidation Functionalized Isobutylene Isoprene Rubber toward Green-curing Pathway and High-performance Composites  

作　　者：Han Gao Bai-Chuan Cui Hong-Bing Zheng Fu-Lan Hao Yan Shi Li-Qun Zhang 

机构地区：[1]Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China [2]Shandong Chambroad Sinopoly New Materials Co.,Ltd.,Binzhou 256600,China

出　　处：《Chinese Journal of Polymer Science》2023年第11期1818-1828,I0011,共12页高分子科学（英文版）

基　　金：the National Key Research and Development Program of China;the National Natural Science Foundation of China(Nos.2022YFB3704800,2022YFB3704802 and 52273051);the Fundamental Research Funds for the Central Universities(No.JD2221)。

摘　　要：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),epoxyfunctionalized 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.

关 键 词：IIR Epoxy functionalization Air-tightness Fatigue failure resistance 

分 类 号：TB33[一般工业技术—材料科学与工程]