Measurement of glass transition temperature by mechanical (DMTA), thermal (DSC and MDSC), water diffusion and density methods: A comparison study

Mohammad Shafiur Rahman, Insaaf Mohd Al-Marhubi, Abdullah Al-Mahrouqi

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Glass transition measured by DMTA from the change in slope in storage modulus was 55 °C, which was 10.5 °C lower than the value measured by tan δ peak. Initial glass transition measured by DSC, increased exponentially and reached a constant value of 55 °C at or higher heating rate of 30 °C/min. Transition temperature, measured by MDSC, remained constant up to heating rate 15 °C/min and then decreased. The glass transition values determined from reversible heat flow was 60 °C. The break in diffusivity and density (i.e. volume) was observed at 50 °C below the glass transition temperature measured by thermal and mechanical methods.

Original languageEnglish
Pages (from-to)372-377
Number of pages6
JournalChemical Physics Letters
Volume440
Issue number4-6
DOIs
Publication statusPublished - Jun 8 2007

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

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