The randomcopolymerization 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。
2
The invention relates to a while randomcopolymerization polypropylene (PP-R) light resistant pipe which comprises a white (PP-R) water pipe.
本发明涉及一种白色无规共聚聚丙烯阻光管。
3
The above results suggest that hair melanin iss complex random polymer, formed by a very complicated process of oxidation and copolymerization of both sulfur-containing and non-sulfur amino acids.