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研究了采用间氯过氧苯甲酸(MCPBA)为氧化剂,由高活性聚异丁烯(HRPIB)制备环氧化聚异丁烯(EPIB)的新工艺。考察了反应温度、反应时间及原料双键与MCPBA摩尔配比对环氧化物的环氧值的影响。实验确定了PIB环氧化反应的适宜工艺条件:反应温度为30℃,反应时间为2h,双键与MCPBA的摩尔比为1∶1.3,在此条件下,环氧值为0.7887;红外光谱和核磁分析证明了所制备的产物为目标产物。该产品无色粘稠,将应用于橡胶改性、树脂改性领域。
A new process for preparing epoxidized polyisobutylene (EPIB) from high activity polyisobutylene (HRPIB) using m-chloroperoxybenzoic acid (MCPBA) as oxidant was studied. The effects of reaction temperature, reaction time and mole ratio of raw material double bond to MCPBA on the epoxy value of epoxide were investigated. The optimum technological conditions of PIB epoxidation were determined experimentally: the reaction temperature was 30 ℃, the reaction time was 2h, the molar ratio of double bond to MCPBA was 1: 1.3, and the epoxy value was 0.7887. The infrared spectrum and Nuclear magnetic analysis proved that the prepared product was the target product. The product is colorless and viscous, will be used in rubber modification, resin modification field.