Brillouin scattering from oligomers of polydimethylsiloxane and the assignment of the hypersonic a loss peak in polymers

Alan Adshead, S. M. Lindsay, C. G. Delides, T. A. King, I. W. Shepherd

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Hypersonic sound speed and loss have been measured in poly(dimethylsiloxane) fluids of viscosities 0.65 to 3.5 × 104 centistoke. Both rise to a plateau level for viscosity values in excess of ∼10 centistokes. Loss measurements as a function of temperature indicate that the α loss temperature (Tα) in the dimer is depressed below 180K compared to 230K in the high molecular weight materials. This molecular weight dependence of Tα is used to account for the hypersonic loss as a function of molecular weight in polystyrene and polypropylene glycol in addition to the assignment of the α loss peak in polydimethylsiloxane.

Original languageEnglish (US)
Pages (from-to)329-332
Number of pages4
JournalPolymer
Volume20
Issue number3
DOIs
StatePublished - Mar 1979
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Brillouin scattering from oligomers of polydimethylsiloxane and the assignment of the hypersonic a loss peak in polymers'. Together they form a unique fingerprint.

  • Cite this