丁二烯－甲基丙烯酸甲酯嵌段共聚物的阴离子聚合及表征

讨论了用阴离子方法进行了二烯与甲基丙烯酸甲酯共聚合的过程，并用ＧＰＣ、ＦＴＩＲ、ＮＭＲ和动态粘弹谱对共聚物进行了表征．证明所得聚合物为具有较高分子量、窄分布的二嵌段共聚物．

ANIONIC COPOLYMERIZATION AND CHARACTERIZATION OF POLY(BUTADIENE)-BLOCK-POLY(METHYLMETHACRYLATE) COPOLYMER

The known structure block copolymers could be obtained through anionic polymerization if the solvents and monomers were purified rigorously.This paper described the procedure about the synthesis of poly(butadiene)-block-poly (methyl methacrylate)copolymers.The polarity of solvents used for polymerization affects drastically the tacticity of polybutadiene.As the butadiene polymerized in THF instal of benzene,its Tg increases from -67℃ to -20℃.The results from the characterization of GPC,FTIR,NMR andDMA demonstrated that the polymers obtained were block copolymers with contents morethan 80% 1,4 polybutadiene and 70% syndiotachc PMMA.