星形SIS嵌段共聚物的动态力学性能

The Study on Dynamic Mechanical Properties of SIS Star-Shaped Block Copolymer

本文报导了用粘弹谱仪对组成相同、支链分子量相同而支化度不同的,以及支化度相同、支链分子量不同的系列星形SIS嵌段共聚物的测试结果,实验发现:支链分子量是影响各相玻璃化转变温度和动态杨氏模量E′的主要因素,支化度对各相玻璃化温度影响很小,但是对E′影响是明显的。

In this paper we reported the dynamic mechanical properties of series of SIS Star-shaped block copolymer measured by Rheovibron Viscoelastometer,which have the same composition,the same molecular weight of branch chain,but different degree of branching as well as the same degree of branching but different molecular weight of branch chain.We observed that the molecular weight of branch chain has serious influence on glass transition temperature for each phase and dynamic Young’s moduli E’,but the degree of branching has minor influence on glass temperature and evident influence on E’.