双组分α-二亚胺镍复式催化剂制备长支链聚乙烯  

SYNTHESIS AND PROPERTIES OF LONG CHAIN BRANCHED POLYETHYLENE WITH BINARY CATALYST SYSTEM

作　　者：艾娇艳[1] 祝方明[2] 林尚安[2] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510643 [2]中山大学化学学院高分子研究所,广东广州510275

出　　处：《高分子材料科学与工程》2005年第4期94-97,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(20174050);广东省基金(990270)资助项目

摘　　要：报道以两种后过渡金属催化剂二-(2,6-二甲基苯基)-丁二亚胺氯化镍和二-(2-甲基苯基)-丁二亚胺氯化镍所组成的复式催化体系,催化单一乙烯聚合可制备得到长支链(n≥6)的聚乙烯。在合适的聚合条件下此复式催化剂具有很好的协同作用,其催化活性比任一单一催化剂的催化活性都高。本文详细研究了两种催化剂的摩尔比、聚合温度等聚合条件对催化活性及产物结构的影响。用13C-NMR、FT-IR、DSC对聚合物进行了表征。Branched polyethylene were obtained by using homogeneous binary catalyst system composed of two different α-Diimine Nickel catalysts in the presence of MAO. At appropriate polymerization conditions the binary catalyst system shows a good synergic effect, the polymerization activity is higher than any single catalyst. ^(13)C-NMR spectra of resulting PE exhibits methyl, ethyl, butyl, amyl and significant amount of long chain branches (n≥6) in the backbone of polyethylene. The molar ratio of two catalysts and the polymerization temperature(T_p) influence catalytic activity, molecular weight, degree of branching and melting point of the resulting polyethylene greatly.

关 键 词：α-二亚胺镍催化剂 复式催化剂 长支链聚乙烯 

分 类 号：TQ314.242[化学工程—高聚物工业]