Time and ensemble averaged dynamic light scattering in orthoterphenyl above and below the glass transition

D. L. Sidebottom, C. M. Sorensen

Research output: Contribution to journalConference article

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Abstract

The way useful information regarding structural relaxation can be assessed from light scattering in the glass is shown using a novel ensemble-average technique. Dynamic light scattering (DLS) measurements performed on glass forming orthoterphenyl reveal an inequality between time and ensemble average correlation functions near and below the calorimetric glass transition temperature, and hence demonstrate ergodicity breaking. The ensemble averaged measurements provide a measure of the so-called non-ergocity parameter below glass transition temperature. The DLS results for orthoterphenyl indicate that the function form for non-ergodicity parameter is consistent with Mode Coupling theory predictions.

Original languageEnglish (US)
Pages (from-to)189-194
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume455
StatePublished - Jan 1 1997
EventProceedings of the 1996 MRS Fall Meeting - Boston, MA, USA
Duration: Dec 2 1996Dec 6 1996

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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