ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS

CUI Nannan; ZHANG Zhicheng; LI Huayi; CHEN Shangtao; ZHANG Xiaofan; KE Yucai; HU Youliang

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ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS

Research Article | 更新时间：2021-03-19

- ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS
- Acta Polymerica Sinica Issue 6, Pages: 902-906(2005)
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- Published：20 December 2005，
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CUI Nannan, ZHANG Zhicheng, LI Huayi, CHEN Shangtao, ZHANG Xiaofan, KE Yucai, HU Youliang. ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS. [J]. Acta Polymerica Sinica (6):902-906(2005)
DOI：

CUI Nannan, ZHANG Zhicheng, LI Huayi, CHEN Shangtao, ZHANG Xiaofan, KE Yucai, HU Youliang. ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS. [J]. Acta Polymerica Sinica (6):902-906(2005) DOI：

摘要

制备了3种含有不同内给电子体(邻苯二甲酸二异丁酯

9-二甲氧基甲基-芴和1

1-双甲氧基甲基-环丁烷)的MgCl2负载型丙烯聚合齐格勒-纳塔(Z-N)催化剂

研究了给电子体结构与聚合性能之间的关系

用红外光谱剖析了催化剂及其相关化合物的结构

结果发现催化剂中的内给电子体直接与MgCl2配位

而没有与TiCl4结合.内给电子体的加入

降低了Z-N催化剂中钛的含量

提高催化丙烯聚合的活性

使聚合物的分子量分布变窄.聚合物立构规整度的变化强烈依赖于内给电子体的结构.

Abstract

MgCl2-supposed Ziegler-Natta (Z-N) catalysts containing three different Lewis bases (diisobutyl phthalate

9-bis (methoxymethyl) fluorine and 1

1-bis (methoxymethyl) cyclobutane) as intemal donors were prepared for pmpylene polymerization．The relationship between the structure of donors and the performance of catalysts were investigated The Z-N catalyst contmning 9

9-bis(methoxymethyl) fluorine as intemal donor and the related compounds were characterized by FTIR spectroscopy．It was found that the intemal donor in the MgCl2/TiCl4/ Donor catalvst svstem was directly coordinated to MgCl2．The introduction of intemal donors decreased the Ti content in the catalyst system．increased the catalytic activity and narrowed the molecular Hlass distribution of polymers obtained The stereospeciflcity of Z-N catalysts gready depended on the structure of electron donors．A model of muhi-active sites on heterogeneous Z-N catalyst was proposed to explain the experimental resuhs．

关键词

Ziegler-Natta催化剂给电子体丙烯聚合

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