聚异戊二烯的紫外光老化机理研究  

Study on UV Aging Mechanism of Polyisoprene

作　　者：刘金瑞 李邦森 林晓雪 张妍 张大帅[1] 李晨[1] 石建军 孙天一 史载锋[1] 林强[1] LIU Jinrui;LI Bangsen;LIN Xiaoxue;ZHANG Yan;ZHANG Dashuai;LI Chen;SHI Jianjun;SUN Tianyi;SHI Zaifeng;LIN Qiang(Hainan Normal University,Haikou 571158,China)

机构地区：[1]海南师范大学化学与化工学院/海南省水污染治理与资源化重点实验室,海南海口571158

出　　处：《橡胶工业》2024年第6期411-414,共4页China Rubber Industry

基　　金：国家自然科学基金资助项目(22168017);国家自然科学基金青年基金资助项目(21601043);海南省自然科学基金资助项目(222CXTD513,2019RC187,217101)。

摘　　要：通过傅立叶红外光谱、凝胶渗透色谱、差示扫描量热曲线、核磁共振波谱和紫外-可见吸收光谱分析顺式-1,4-聚异戊二烯(以下简称聚异戊二烯)的紫外光老化机理。结果表明:聚异戊二烯的耐紫外光老化性能较差,紫外光照后其表面出现波纹;在紫外光照过程中,聚异戊二烯主要发生支链取代、氢和自由基转移反应,其玻璃化温度升高。The UV aging mechanism of cis-1,4-polyisoprene(hereinafter referred to as polyisoprene)was analyzed by Fourier transform infrared spectroscopy,gel permeation chromatography,differential scanning calorimetry,nuclear magnetic resonance spectroscopy and UV-Vis absorption spectroscopy.The results showed that,the UV aging resistance of polyisoprene was poor,and ripples appeared on its surface after UV irradiation.During the UV irradiation process,polyisoprene mainly underwent branched chain substitution,hydrogen and free radical transfer reactions,and its glass transition temperature increased.

关 键 词：聚异戊二烯 紫外光 老化机理 

分 类 号：TQ333.3[化学工程—橡胶工业]