拉伸结晶对反式-1,4-聚异戊二烯/丁苯橡胶并用硫化胶性能的影响  

Effects of stretch crystallization on properties of trans-1,4-polyisoprene/styrene-butadiene rubber vulcanizates

作　　者：王林[1] 宋传江[2] 胡天辉[2] 黄自华[2] 侯清麟[1] 杨军[1,2] 

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007 [2]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《合成橡胶工业》2012年第5期388-391,共4页China Synthetic Rubber Industry

摘　　要：研究了反式-1,4-聚异戊二烯(TPI)拉伸结晶对TPI/丁苯橡胶(SBR)并用硫化胶性能的影响。结果表明,TPI拉伸结晶能够明显降低TPI/SBR并用硫化胶的扯断伸长率;热老化后,随着预拉伸倍数的增大,TPI/SBR并用硫化胶硬度的变化增大,拉伸强度和扯断伸长率的变化率增大。预拉伸2.0倍时试样的动态疲劳性能最好。随着预拉伸倍数的增大,试样的熔融温度逐渐向高温方向移动,结晶度呈现出降低趋势。The effects of stretch crystallization of trans-1,4-polyisoprene （TPI） on properties of TPI/ styrene-butadiene rubber （SBR） vulcanizates were investigated. The results showed that the stretch crystallization of TPI could significantly reduce the elongation at break of TPI/SBR vulcanizates. After heat aging, with the increase of pre-stretch times, the change of hardness as well as the change rate of tensile strength and elongation at break of the sam-ples increased. The dynamic fatigue performance of the samples was the best when pre-stretching times was 2. O. With increasing the pre-stretch times, the melting temperature of the samples gradually shifted to higher temperature, while the crystallinity showed a decreasing trend.

关 键 词：拉伸结晶 反式-1 4-聚异戊二烯 丁苯橡胶 并用 力学性能 动态疲劳性能 

分 类 号：TQ330.6[化学工程—橡胶工业]