Mechanical spectrum study of glass transition by a composite method

Y. H. Yuan, L. Zhang, X. L. Wang, X. N. Ying, Feng Yan, Y. N. Huang, J. S. Zhu, Y. N. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Normalized mechanical spectra of glycerol, 1,2-propanediol carbonate and poly(vinyl chloride)/di(2-ethyl-hexyl) phthalate (PVC/DOP) blends were studied in the temperature range from 100 to 300 K by a composite method. The dynamic glass transition was observed, which exhibits a peak of temperature-dependent loss modulus. The peak moves toward higher temperature with higher measuring frequency, which accords with the relaxation feature of the dynamic glass transition. Another characteristic temperature can be marked in the mechanical spectrum by the onset of storage modulus change, which is labeled as Tgm. Tgmis found to be nearly equal to the calorimetric glass transition temperature in glycerol, 1,2-propanediol carbonate and di(2-ethyl-hexyl) phthalate. As we expected, this onset temperature in the mechanical spectrum has an intimate relation with the calorimetric glass transition of materials, and it can be regarded as a representative when the calorimetric glass transition temperature is not available. Finally, normalized mechanical spectra of PVC/DOP blends with different PVC content were obtained and mechanical glass transition temperatures Tgmwere determined.
Original languageEnglish
Pages (from-to)3771-3774
Number of pages4
JournalPhysica B: Condensed Matter
Volume404
Issue number20
DOIs
Publication statusPublished - 1 Nov 2009

Keywords

  • Glass transition
  • Internal friction
  • Mechanical spectrum
  • Polymer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this