厦门大学学报（自然科学版）2016，Vol.55Issue(6)：815-822,8.DOI:10.6043/j.issn.0438-0479.201603020
丁苯橡胶的紫外光老化和热氧老化机理
Mechanism of UV Aging and Thermal Oxidative Aging of Styrene Butadiene Rubber
王相鹏 1杨慧 1郑津 1薛惠芸 1丁玲 1李志辉 1邹友思1
作者信息
- 1. 厦门大学材料学院，福建 厦门 361005
- 折叠
摘要
Abstract
The aging of two kinds of styrene butadiene rubber (SBR)(SBR-1502 and SBR-SiO2 containing 20%(by mass)SiO2 ) was studied with UV aging and thermal oxidative aging methods,respectively.The aging mechanism was studied using FT-IR,1H-NMR,and UV-vis absorption spectroscopy.The results showed that the ability of resistance to UV aging of SBR was poor.After UV aging for 0.5 day,the molecular structure changed sharply.The ability of resistance to thermal oxidative aging of SBR was much bet-ter than its ability of resistance to UV aging.After thermal oxidative aging for 5 days,the molecular structure began to change. SiO2 had the ability of significantly increasing the ability of resistance to UV aging.During UV aging,α-H of double bond was oxi-dized to alcohol,then to aldehyde,and ultimately the largeπ-conj ugated structure was formed.The functional groups of SBR showed the following order of aging reaction activity:α-H of double bond>1 ,2-polymerized double bond>1 ,4-polymerized double bond>benzene ring.关键词
丁苯橡胶/紫外光老化/热氧老化/老化机理Key words
styrene butadiene rubber(SBR)/UV aging/thermal oxidative aging/aging mechanism分类
化学化工引用本文复制引用
王相鹏,杨慧,郑津,薛惠芸,丁玲,李志辉,邹友思..丁苯橡胶的紫外光老化和热氧老化机理[J].厦门大学学报（自然科学版）,2016,55(6):815-822,8.
