KINETICS OF ZIEGLER PROPYLENE POLYMERIZATION

被引:17
作者
BULS, VW [1 ]
HIGGINS, TL [1 ]
机构
[1] SHELL DEV CO,DEER PK,TX 77536
关键词
D O I
10.1002/pol.1973.170110502
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Rate studies were done on the polymerization of propylene with the TiCl//3-diethyl-aluminum chloride catalyst system. A yield equation was developed which fits experimental data closely. Rate correlations show that the initial rate is exponentially related to the TiCl//3/alkyl ratio. Water and other active hydrogen compounds reduce rate; hydrogen increases rate. A ″bimetallic″ mechanism is proposed which views catalyst activation as consisting of three equilibria, followed by a propagation step where an alkyl group is transferred to the growing chain, and a realkylation of the hydride that remains after the propagation step.
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页码:925 / 938
页数:14
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