茂金属催化剂合成苯乙烯与乙烯嵌段共聚物及表征

SYNTHESIS OF BLOCK COPOLYMERS PE-b-sPS AND sPS-b-Poly(S-co-E) WITH TITANOCENE CATALYST AND THEIR CHARACTERIZATION

由茂基三苄氧基钛 [Cp Ti(OBz) 3 ]和甲基铝氧烷 (MAO)组成的催化体系对苯乙烯与乙烯通过先预聚合乙烯和先预聚合苯乙烯进行嵌段共聚合 ,研究了第一单体的预聚合时间对总催化效率的影响。通过萃取分离可得到嵌段共聚物 PE- b- s PS和 s PS- b- poly(S- co- E)。嵌段共聚物的微观结构、热行为及结晶行为用 13 C NMR、DSC及

Two ways of block copolymerization of styrene and ethene were performed with CpTi(OBz) 3/MAO catalyst system in toluene. The block copolymers PE b sPS and sPS b Poly(S co E) were first obtained by extraction fractionation from the block copolymerization products. The micro structures, thermal behavior and crystalline behavior of these block copolymers were characterized by means of 13 C NMR, DSC, WAXD.