多单体熔融接枝聚丙烯的微相分离结构  

Microphase Separation Structure Formed in GMA/St Multi-monomer Melt Grafted Polypropylene

作　　者：陈宾[1] 张景春[1] 谢续明[1] 

机构地区：[1]清华大学化工系高分子研究所

出　　处：《高等学校化学学报》2004年第8期1572-1575,M008,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号 :2 0 1740 2 2 );重大研究计划"理论物理学及其交叉科学若干前沿问题"子课题 (批准号 :90 10 3 0 3 5 );重点项目(批准号 :10 3 3 40 2 0 );清华大学分析测试基金资助

摘　　要：用熔融接枝方法制备了一系列不同接枝率的 GMA(甲基丙烯酸缩水甘油酯 ) /St(苯乙烯 )多单体接枝聚丙烯 [PP-g-( GMA-co-St) ],基体聚丙烯包括均聚聚丙烯和共聚聚丙烯 (乙烯的摩尔分数分别是 6.0 % ,1 2 % ,3 3 % ) .接枝聚丙烯经过分离提纯后 ,用四氧化钌 ( Ru O4 )进行染色 ,然后用透射电子显微镜 ( TEM)观察其微观形态 .发现在接枝聚丙烯中形成了长程有序的、球状的微相分离结构 ,这种在分子量和分子结构都是多分散体系中形成的微相分离结构尚未见报道 .同时 。The glycidyl methacrylate(GMA) and styrene(St) multi-monomer grafted polypropylene(PP),PP-g-(GMA-co-St),with various grafting degrees were prepared by melt-grafting process. The homo-PP and ethylene-co-polypropylene with different contents of ethylene were chosen to be backbone PP for the grafting process. After purification,PP-g-(GMA-co-St) was stained by RuO 4,and its microphase morphology was observed by Transmission Electron Microscope(TEM). The microphase separation morphology, i.e . spherical long-range order structure was found in the grafted PP. Such nano-structure morphology formed in melt-grafted polymer was unique and original. The effects of E block fractions in EP copolymer and grafting degree on the microphase morphology were discussed. This study indicated that even in the melt grafting system,where molecular weight and molecular architecture are both multi-dispersed,copolymers with long grafts could also be separated in a microphase into long-range order structures.

关 键 词：微相分离 聚丙烯 多单体熔融接枝 

分 类 号：O631[理学—高分子化学]