Ultrasonically assisted synthesis and degradation of poly(dimethyl siloxane)

Gareth J. Price, Matthew P. Hearn, Emma N.K. Wallace, Ali M. Patel

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The effect of ultrasound on the ring opening polymerization of octamethylcyclotetrasiloxane to give poly(dimethyl siloxane), PDMS, is described. Sonication was found to increase the rate of polymerization over conventional stirring and to give higher molecular weights with lower polydispersities. The results are explained in terms of the efficient mixing and dispersal of acid catalyst given by sonication. The basic effects of sonicating dilute PDMS solutions are also described but it was found that, in contrast to other polymerizations, the degradation plays little part in determining the molecular weight during synthesis.

Original languageEnglish
Pages (from-to)2303-2308
Number of pages6
JournalPolymer
Volume37
Issue number12
DOIs
Publication statusPublished - Jun 1996

Keywords

  • Molecular weight control
  • PDMS
  • Silicones
  • Sonochemistry
  • Ultrasound

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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