PPS/TLCP共混体系的结晶行为  

Crystallization behavior of poly(p-phenylene sulfide) in blends with thermotropic liquid crystalline polyester

作　　者：张冠星[1] 刘春丽[2] 王孝军[1] 杨杰[3] 李光宪[1] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065 [2]四川大学化学学院,成都610065 [3]四川大学分析测试中心材料科学技术研究所,成都610065

出　　处：《四川大学学报（自然科学版）》2007年第6期1285-1288,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：十五863资助项目(2001AA334020-1)

摘　　要：采用差示扫描热量仪(DSC),通过非等温结晶方法研究了全芳及半芳族热致性液晶(TLCP)对聚苯硫醚(PPS)结晶行为的影响,并通过偏光显微镜(PLM)分析了结晶过程中的微观结构.研究表明,加入少量全芳或半芳族TLCP,可显著提高PPS最大结晶温度和结晶速率,全芳族TLCP起异向成核作用,而半芳族TLCP促进晶体增长.The nonisothermal crystallization and melting behaviors of poly （p-phenylene sulfide） （PPS） in blends with wholly aromatic and semiaromatic thermotropic liquid crystalline polyester （TLCP） prepared by melt-mixing were investigated by differential scanning calorimetry （DSC）. The crystal structure of blends was probed by polarized light microscopy （PLM）. It has been shown that the addition of TLCP causes a great increase in the max crystallization temperature and overall crystallization rate of PPS, wholly aromatic TLCP changed the mechanism of nucleation of the PPS crystals from homogeneous nucleation to heterogeneous nu- cleation, on the contrast semiaromatic TLCP accelerated PPS＇ s spherulitic growth rate.

关 键 词：PPS TLCP结晶 

分 类 号：O63[理学—高分子化学]