石油化工2013，Vol.42Issue(2)：152-157,6.
硅烷类外给电子体对Ziegler-Natta催化剂催化丙烯聚合的影响
Effect of Alkoxysilane External Donor on Propylene Polymerization Catalyzed by Ziegler-Natta Catalyst
杨光 1毕福勇 1宋文波 1张晓萌 1魏文骏1
作者信息
- 1. 中国石化北京化工研究院,北京100013
- 折叠
摘要
Abstract
The effect of alkoxysilane external donors on propylene polymerization catalyzed by Ziegler-Natta catalyst was studied and the as-polymerized polypropylene(PP) was characterized by means of DSC,GPC and WAXRD.The results indicate that dialkoxysilanes show the high activity and stereo-regularity while tetraalkoxysilanes exhibit the high hydrogen response.Under the same polymerization conditions,the distribution of the average molecular mass of PP prepared with dialkoxysilane is broader.The amount of H2 has no influence on the crystallization of PP.The probability of PP with high relative molecular mass and stereo-regularity occurring multiple melting is small.Considering that the energy level of the highest occupied molecular orbits of dialkoxysilanes is higher than that of the other external donors,it shows higher stereo-regularity.关键词
硅烷类外给电子体/Ziegler-Natta催化剂/丙烯聚合/聚丙烯/立构定向性/氢调敏感性Key words
alkoxysilane external donor/ Ziegler-Natta catalyst/ propylene polymerization/polypropylene/ stereo-regularity/ hydrogen response分类
化学化工引用本文复制引用
杨光,毕福勇,宋文波,张晓萌,魏文骏..硅烷类外给电子体对Ziegler-Natta催化剂催化丙烯聚合的影响[J].石油化工,2013,42(2):152-157,6.
