Synthesis of telechelic vinyl/allyl functional siloxane copolymers with structural control?

Polymer Chemistry Pub Date: 2014-09-15 DOI: 10.1039/C4PY00919C

Abstract

Multifunctional siloxane copolymers with terminal vinyl or allyl functional groups are synthesised through the borane-catalysed polycondensation of hydrosilanes and alkoxysilanes. Copolymers of varying molecular weights ([M with combining macron]w = 13?200–70?300 g mol?1), spatially well-distributed functional groups and high end-group fidelity are obtained in a facile and robust synthetic scheme involving polycondensation, end-group transformation and different functionalisation reactions such as Cu(I)-mediated azide–alkyne cycloaddition. Pendant alkyl chloride, alkyl azide, bromoisobutyryl, 4-nitrobenzene and 1-ethyl-imidazolium chloride fragments with programmable spatial distributions are incorporated in the copolymer backbones. NMR and FTIR spectroscopy as well as size exclusion chromatography corroborate the efficacy and versatility of this modular approach.

Graphical abstract: Synthesis of telechelic vinyl/allyl functional siloxane copolymers with structural control
Recommended Literature