A novel process for producing homopolymers and copolymers of ethylene which involves contacting ethylene and/or ethylene and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta type catalyst. at least one halogenated hydrocarbon, at least one compound of the formula X
n
ER
3-n
as a co-catalyst and at least one compound containing at least one carbon-oxyen-carbon linkage (C—O—C) of the formula R
1
—O(—R
2
—O)
n
—R
3
as an external electron donor. Also provided are films and articles produced therefrom.
一种生产
乙烯均聚物和共聚物的新工艺,包括在聚合条件下将
乙烯和/或
乙烯和至少一种或多种其他烯烃与齐格勒-纳塔型催化剂接触。
n
ER
3-n
作为助催化剂,以及至少一种含有至少一个碳-氧-碳连接(C-O-C)的式 R
1
-O(-R
2
-O)
n
-R
3
作为外部电子供体。此外,还提供了由其制成的薄膜和物品。