COMPOSITION AND TACTICITY DISTRIBUTION OF PROPYLENE BUTENE COPOLYMER

XU Junting; FENG Linxian; YANG Shilin

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COMPOSITION AND TACTICITY DISTRIBUTION OF PROPYLENE BUTENE COPOLYMER

Research Bulletin | 更新时间：2021-03-19

- COMPOSITION AND TACTICITY DISTRIBUTION OF PROPYLENE BUTENE COPOLYMER
- Acta Polymerica Sinica Issue 4, Pages: 508-512(1997)
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- Published：20 August 1997，
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XU Junting, FENG Linxian, YANG Shilin. COMPOSITION AND TACTICITY DISTRIBUTION OF PROPYLENE BUTENE COPOLYMER. [J]. Acta Polymerica Sinica (4):508-512(1997)
DOI：

XU Junting, FENG Linxian, YANG Shilin. COMPOSITION AND TACTICITY DISTRIBUTION OF PROPYLENE BUTENE COPOLYMER. [J]. Acta Polymerica Sinica (4):508-512(1997) DOI：

摘要

丙烯丁烯共聚物的组成和等规度分布徐君庭封麟先杨士林（浙江大学高分子科学与工程学系杭州３１００２７）关键词丙烯丁烯共聚物

ＺｉｅｇｌｅｒＮａｔａ催化剂

分级用负载型ＺｉｅｇｌｅｒＮａｔａ催化剂制备的聚丙烯其等规度往往分布较宽

具有一定的分散性

这是由于催化剂中存在多种活性中心而造成的

因此

聚丙烯的等规度分布与活性中心密切相关

它反应了催化剂活性中心的分散性

常用来获得催化剂活性中心?...

Abstract

Copolymer of propylene with a small amount of butene was prepared with supported Ziegler Natta catalyst MgCl2/TiCl4 AlEt3/DPDMS and was fractionated with preparative temperature rising elution fractionation technique.The composition and tacticity distribution of copolymer were studied.It is found that the copolymer has a broad tacticity distribution and fractionation is mainly conducted according to tacticity.Compositional heterogeneity also exists to some extent.Isotacticity of fractions increases with elution temperature

but butene content shows a maximum in the fraction eluted at 70℃.With combination of previous work

this phenomenon is explained to be the result of the presence of electron donor in aspecific active site.

关键词

丙烯丁烯共聚物ＺｉｅｇｌｅｒＮａｔａ催化剂分级

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