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Effects of alkylaluminum as cocatalyst on the active center distribution of 1-hexene polymerization with MgCl2-supported Ziegler–Natta catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50492 46796 2015 3 PDF Available
Title
Effects of alkylaluminum as cocatalyst on the active center distribution of 1-hexene polymerization with MgCl2-supported Ziegler–Natta catalysts
Abstract

•The influence of the cocatalyst on active center distribution was investigated.•The Al/Ti ratio caused continuous shifting of the active center distribution.•Variation of TEA concentration could generate different active centers.

Effect of AlEt3 on 1-hexene polymerization with MgCl2-supported Ziegler–Natta catalyst was studied. Complete activation of active centers (C*) producing medium to low molecular weight polymer requires relatively higher Al/Ti than C* producing high molecular weight polymer. Raising Al/Ti from 30 to 300 caused continuous shifting of the active center distribution from centers of smaller number, fast chain propagation and slow chain transfers to centers of larger number, slow chain propagation and fast chain transfers. Chain transfer with AlEt3 is more evident in C* producing lower molecular weight polymer.

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Keywords
Ziegler–Natta catalyst; Cocatalyst; Active center distribution
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Effects of alkylaluminum as cocatalyst on the active center distribution of 1-hexene polymerization with MgCl2-supported Ziegler–Natta catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 62, 5 March 2015, Pages 104–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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