环氧化天然橡胶生胶加速贮存老化期间交联结构变化∗

摘要

The variations of molecular structure and properties of epoxidized natural rubber( ENR) during accel-erated storage were studied by FTIR,NMR and DSC. The results indicated that oxidative degradation was occuried with the prolonging of the storage time,automatic crosslinking between the molecular of epoxidized natural rubber was happened gradually. The crosslinking density and extent also increased gradually. It reached the maximum when the aging time was 12h,and then decreased gradually.%采用红外光谱、核磁共振交联密度仪及差示扫描量热仪等现代仪器分析方法研究环氧化天然橡胶生胶加速贮存老化期间分子结构与性能变化。结果表明：随着贮存时间的增加伴随着氧化降解现象的发生，环氧化天然橡胶的分子不断进行自然交联，交联密度与程度逐渐增大，老化12 h时达到最大，随后出现下降趋势。