伽马辐照改性聚苯乙烯-丁二烯二嵌段共聚物力学性能的DMTA分析

Mechanical Properties of Irradiation-modified Polystyrene-polybutadiene Block Copolymer Studied by DMTA

本实验研究了聚苯乙烯-丁二烯二嵌段共聚物经辐照后动态力学特性的变化特征.参照以前有关SB辐照效应的正电子湮灭寿命谱和傅立叶红外光谱分析结果,从微观角度解释了辐照前后的SB玻璃化转变温度、低温力学特性及储能模量等物理特性变化的机理.

Dynamic mechanical properties of irradiated and un-irradiated SB were studied.Comparing the previous PALS results and FT-IR results,it deduced that there is a correlation between microstructure change and macro mechanical change of irradiated and un-irradiated polystyrene-block-butadiene.The critical irradiation dose is 500kGy,which cause a sharp fall of mechanical properties of SB,that is related to the abrupt change of microstructure of irradiated SB.