Polymerization of cyclododecasiloxanes with Si-H and Si-OEt side groups by the piers-Rubinsztajn reaction

Masashi Yoshikawa, Hiroya Shiba, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Two types of cyclododecasiloxanes possessing SiH and SiOEt side groups were polymerized by the Piers-Rubinsztajn (P-R) reaction. Cyclododecasiloxane possessing both methyl and ethoxydimethylsilyl side groups (Cyclo12-Me-Si- Me2(OEt)) was synthesized by ethoxylation of cyclododecasiloxane possessing both methyl and dimethylsilyl side groups (Cyclo12-Me-SiHMe2). Cyclo12-Me-SiMe2(OEt) and Cyclo12-Me-SiHMe2 were polymerized by the P-R reaction, using B(C6F5)3 as a catalyst. The original cyclic structures were retained after the reaction without cleavage of the SiOSi bonds. Dimethylsilane elimination between two side SiHMe2 groups and the consecutive siloxane-bond formation occurred concomitantly during the main P-R reaction. The effectiveness of the P-R reaction between oligosiloxanes toward preparation of polyorganosiloxanes with well-defined architectures has been demonstrated.

Original languageEnglish
Pages (from-to)747-753
Number of pages7
JournalBulletin of the Chemical Society of Japan
Volume91
Issue number5
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Cyclic siloxane
  • Cyclododecasiloxane
  • Piers-Rubinsztajn reaction

ASJC Scopus subject areas

  • Chemistry(all)

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