CATALYTIC HYDROSILATION OF POLYBUTADIENES AS A ROUTE TO FUNCTIONAL POLYMERS

A Iraqi, S Seth, C A Vincent, D J Cole-Hamilton, M D Watkinson, Isla Margaret Graham, D Jeffrey

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Abstract

Polybutadienes having a variety of different microstructures have been hydrosilated using HSiMexCl3-x, x=0-2 in the presence of H2[PtCl6]. High conversions of double bonds pendant from the main chain are observed but hydrosilation also occurs on the backbone of the polymer especially if there is a high percentage of backbone double bonds. This backbone hydrosilation is accompanied by double-bond migration along the polymer backbone to give conjugated diene units within the polymer backbone. These polymers have been further functionalised by reactions with alcohols [EtOH, EtO(CH2CH2O)2H, 4-hydroxybiphenyl or MeO(CH2CH2O)nH (M(n) = 500 or 750)] in the presence of Et3N or by alkylation, e.g. with 2-lithiomethylpyridine or with 6-lithio-2,2'-bipyridine. Polymers containing -SiMex(OR)3-x,x = 2 or 0, R = EtO(CH2CH2O)2H or MeO(CH2CH2O)nH (M(n) = 500 or 750) have been shown to form polymer electrolytes, in some cases with room-temperature conductivities as high as 2.5 x 10(-5) S cm-1. Sequential hydrosilation and epoxidation reactions have been carried out to give polymers in which the pendant double bonds have been hydrosilated and the backbone double bonds have been epoxidised.

Original languageEnglish
Pages (from-to)1057-1064
Number of pages8
JournalJournal of Materials Chemistry
Volume2
Issue number10
DOIs
Publication statusPublished - Oct 1992

Cite this

Iraqi, A., Seth, S., Vincent, C. A., Cole-Hamilton, D. J., Watkinson, M. D., Graham, I. M., & Jeffrey, D. (1992). CATALYTIC HYDROSILATION OF POLYBUTADIENES AS A ROUTE TO FUNCTIONAL POLYMERS. Journal of Materials Chemistry, 2(10), 1057-1064. https://doi.org/10.1039/JM9920201057