环氧化反式-1,4-聚异戊二烯的毛细管流变行为  

Capillary rheological behavior of epoxidized trans-1,4-polyisoprene

作　　者：姚薇[1] 王海南[1] 邵华锋[1] 黄宝琛[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2012年第2期106-109,共4页China Synthetic Rubber Industry

基　　金：山东省自然科学基金资助项目(ZR 2010 BM031)

摘　　要：采用毛细管流变仪研究了不同环氧度的环氧化反式-1,4-聚异戊二烯(ETPI)的流变行为。结果表明,ETPI的非牛顿指数小于1.00,熔体为假塑性流体;随着ETPI环氧度的增大,非牛顿指数略有降低。环氧度为30%的ETPI在剪切速率较低时,其熔体的黏流活化能较大,说明对温度的敏感性较大;随着剪切速率的增大,黏流活化能降低,ETPI对温度的敏感性降低。随着剪切速率的增大,ETPI熔体在入口区的弹性形变增大;在相同剪切速率下,ETPI的环氧度越大,入口区的弹性形变越大。The rheological behavior of epoxidized trans-1,4-polyisoprene （EPTI） had been studied by means of capillary rheometer. The results showed that the non-Newtonian index of ETPI was less than 1.00, the melt was pseudoplastic fluid; the non- Newtonian index of ETPI decreased slightly with in- creasing the epoxy degree. The viscous flow activa- tion energy of ETPI with epoxy degree 30% at low shear rate was larger than that at high shear rate, which indicated that ETPI was more sensitive to tem- perature at low shear rate than that at high shear rate. With increasing the shear rate, the elastic de- formation of ETPI at inlet increased ; and at the same shear rate, the higher the epoxy content, the larger the elastic deformation of ETPI at inlet.

关 键 词：环氧化反式-1 4-聚异戊二烯 环氧度 黏流活化能 弹性形变 毛细管流变行为 

分 类 号：TQ330.1[化学工程—橡胶工业]