丁氧基氯化钛载体型催化体系用于乙烯/丁烯-1共聚合的研究

STUDY ON THE SUPPORTED CATALYST OF n-BUTOXYL TITANIUM CHLORIDE FOR COPOLYMERIZATION OF ETHYLENE AND BUTENE-1

近十几年来有关载体型高效齐格勒-纳塔催化体系用于乙烯共聚合反应有了不少报道,其中尤以氯化镁为载体的体系居多。本文系统地研究了以氯化镁为载体的一系列正丁氧基氯化钛催化体系,在催化乙烯与丁烯-1共聚合反应的动力学行为。

A study of ethylene copolymerization with butene-1 using the-MgCl2 supported catalysts of alkoxyl titanium chloride has been- proposed. The main interest of the study was related to the effects of number of butoxyl group on the catalytic behavior and the incorporation of comonomer to the main chain of the polymer. Results show that catalytic activity as well as titanium content in the catalysts decreased when the number of butoxyl group in the catalysts increased. Therefore, it could be considered that butoxyl titanium chloride fixed on the surface of MgCl2 mainly through chloride bridge,only in defect of chloride they combinedthrough unstable oxygen bridge. The influence., of butene-1 concentration on the comonomer incorporation and the various properties of the copolymer obtained were also observed. .The comonomer sequence distributions were measured by 13C-NMR. It could be couclused that the butene-1 unite in copolymer occur principally as isolated branches.