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.
出处
《弹性体》
CAS
1997年第1期8-11,共4页
China Elastomerics
基金
国家自然科学基金
关键词
聚异戊二烯
结晶
动力学
分子量
橡胶
1,4-trans-Polyisoprene
Crystallization
Kinetics
Crystallinity
