Photoinitiated cationic ring-opening polymerization of a cyclosiloxane

Kevin D. Belfield, Gengyi Zhang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Hexamethylcyclotrisiloxane was found to undergo photoinitiated cationic ring-opening polymerization in solution and bulk, upon exposure to UV radiation, in the presence of either sulfonium or iodonium salts or an iminosulfonate derivative. Glass transition temperatures were below -100°C. Molecular weights, determined by size exclusion chromatography relative to polystyrene standards, increased with photolysis lamp intensity. Use of an iodonium photoinitiator afforded poly(dimethylsiloxane) with Mn = 172,000. Polymerization of hexamethylcyclotrisiloxane was accompanied by a small increase in volume (3-4%).

Original languageEnglish (US)
Pages (from-to)165-168
Number of pages4
JournalPolymer Bulletin
Volume38
Issue number2
DOIs
StatePublished - Feb 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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