Effect of Diphenyl Ether in Ti-based Ternary Catalyst on Polymerization, Microstructure and Property of cis-1,4-Polyisoprene

A tricomponent catalyst comprising titanium tetrachloride, triisobutyl aluminum and diphenyl ether is developed for the highly cis -1,4-selective polymerization of isoprene. The influence of the content of diphenyl ether and its complexation order on polymerization, microstructure and performance of...

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Bibliographic Details
Published in:Polymer science. Series B 2019-03, Vol.61 (2), p.124-131
Main Authors: Guanghong Lin, Xiang, Hongping, Xi, Lu, Wen, Zhixia, Wang, Zhaowei, Yu, Junwei, Liu, Xiaoxuan
Format: Article
Language:English
Subjects:
Aluminum
Catalysis
Catalysts
Chemical industry
Chemistry
Chemistry and Materials Science
Complexation
Isoprene
Mechanical properties
Microstructure
Molecular weight
Neodymium
Polymer Sciences
Polymerization
Titanium
Viscosity
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Summary:A tricomponent catalyst comprising titanium tetrachloride, triisobutyl aluminum and diphenyl ether is developed for the highly cis -1,4-selective polymerization of isoprene. The influence of the content of diphenyl ether and its complexation order on polymerization, microstructure and performance of polyisoprene are studied. The polyisoprene synthesized presents high monomer conversion (91–99%). With the increasing of diphenyl ether content, intrinsic viscosity and viscosity-average molecular weight of polyisoprene increase. The molar percentage of cis -1,4-unit is almost unaffected by diphenyl ether and different complexation sequence. The polyisoprene reveals comparable T g (–61.31°C) and mechanical strengths (11.14 MPa, 667%) to commercially available LHIR-80 synthesized with neodymium. However, the viscosity and viscosity-average molecular weight of the former are lower than that of the latter, which avails the processability and maintains excellent mechanical properties.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090419020052