PREPARATION OF LLDPE USING A DUAL FUNCTIONAL CATALYTIC SYSTEM OF Ti(OBu)4-METALLOCENE/B(C6F5)3-AlEt3

LIU Zhongyang; YANG Ling; TAN Zhijun; HE Dawei; HU Youliang; WU Chunhong

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PREPARATION OF LLDPE USING A DUAL FUNCTIONAL CATALYTIC SYSTEM OF Ti(OBu)4-METALLOCENE/B(C6F5)3-AlEt3

Research Article | 更新时间：2021-03-19

- PREPARATION OF LLDPE USING A DUAL FUNCTIONAL CATALYTIC SYSTEM OF Ti(OBu)4-METALLOCENE/B(C6F5)3-AlEt3
- Acta Polymerica Sinica Issue 4, Pages: 471-475(2001)
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- Published：20 August 2001，
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LIU Zhongyang, YANG Ling, TAN Zhijun, HE Dawei, HU Youliang, WU Chunhong. PREPARATION OF LLDPE USING A DUAL FUNCTIONAL CATALYTIC SYSTEM OF Ti(OBu)4-METALLOCENE/B(C6F5)3-AlEt3. [J]. Acta Polymerica Sinica (4):471-475(2001)
DOI：

LIU Zhongyang, YANG Ling, TAN Zhijun, HE Dawei, HU Youliang, WU Chunhong. PREPARATION OF LLDPE USING A DUAL FUNCTIONAL CATALYTIC SYSTEM OF Ti(OBu)4-METALLOCENE/B(C6F5)3-AlEt3. [J]. Acta Polymerica Sinica (4):471-475(2001) DOI：

摘要

以四种取代基不同的桥联茂金属作为乙烯共聚催化剂

以Ti(OR)4为二聚催化剂组成双功能原位聚合催化剂体系

在同一反应釜中

乙烯为唯一聚合单体

以阳离子助剂B(C6F5)3为唯一助催化剂

原位制备LLDPE .该聚合体系催化剂活性高、单体插入率高、得到的聚合物为熔点低、分子量可调的超低密聚乙烯.

Abstract

Polymeriztion of linear low density polyethylene (LLDPE) using a dual functional catalytic system containing different kinds of Metallocene／AlEt3／B(C6F5)3 as copolymerization catalysts and Ti(On-Bu)4／AlEt3 as the ethylene dimerization catalyst was studied．Using the single cocatalyst AlEt3 in the catalytic system

it is easy to overcome the shortcoming of interference between two catalytic metals in a single reactor．Among the four zirconocene systems used

the most active dual functional catalytic system is[Ti(On-Bu)4／AlEt3／Et(Ind)2ZrCl2／B(C6F5)3]

its activity reaches 7.5×106 gPE／molZr·h．The density of obtained LLDPE is 0.89 g／cm3 and 1-butene insertion rate11.7 mol％

关键词

LLDPE双功能催化体系阳离子助剂B(C6F5)3

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MECHANICAL AND OPTICAL PROPERTIES OF LLDPE/NANO-SiO2 COMPOSITES

STUDY ON POLYMERIZATION FOR LLDPE BY COMBINING SUPPORTED METALLOCENE AND Ti(On-Bu)4 AS CATALYSTS

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