反1,4-聚异戊二烯的分子量与结晶性能和结晶速度的关系  

EFFECT OF MOLECULAR WEIGHTS ON THE CRYSTALLIZATION RATES AND CRYSTAL PROPERTIES OF TRANS1,4POLYISOPRENE

作　　者：姚微[1] 黄宝琛[1] 孙云芳 王日国[1] 宋景社[1] 

机构地区：[1]青岛化工学院高分子材料系

出　　处：《弹性体》1997年第1期8-11,共4页China Elastomerics

基　　金：国家自然科学基金

摘　　要：利用膨胀计法研究了不同分子量的反１．４—聚异二烯的结晶动力学，当分子量在０．７４—１４．３万范围时，随着分子量增加，半结晶期先降低后增加，温度在１０—３０℃都有类似的结果；对于同一分子量的ＴＰＩ，随着温度增加，速率常数Ｋ和Ａｖｒａｍｉ指数增大。差示扫描量热仪测试表明随分子量增加，转变温度、熔点和结晶提高。rystallization kinetics of trans-1,4-polyisoprene in different molecular weights has been investigated by means of the dilatometric method.The experimental data fit the Avrami equation,and constant K of the growth rates and Avrami exponent n were obtained.Then,their melting temperatures and crystallinities were measured by differential scanning calorimetry.It shows that Tm and crystallinities increased with increasing of molecular weights.

关 键 词：聚异戊二烯 结晶 动力学 分子量 橡胶 

分 类 号：TQ333.3[化学工程—橡胶工业]