A low density polyethylene produced by a low pressure process, by Ziegler-Natta polymerization or by use of the Phillips process.
采用低压过程，齐格勒·纳塔聚合或菲利浦斯公司工艺生产的一种低密度聚乙烯。
2
The random copolymerization of propylene and ethylene with a supported titanium contained Ziegler-Natta catalyst has been studied.
以载体型钛系齐格勒-纳塔催化剂进行了丙烯和乙烯无规共聚合的研究。
3
The preparation of polypropylene alloy by 2-stage heterophase catalytic copolymerization of ethylene, propylene and 1-butene on spheric Ziegler-Natta catalyst had been studied.