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Capability of conventional Differential Scanning Calorimetry (DSC), temperature modulated DSC (MDSC) and StepScan DSC for the glass transition phenomenon study

Z. ČERNOŠEK1,* , J. HOLUBOVÁ1, E. ČERNOŠKOVÁ2

Affiliation

  1. Department of General and Inorganic Chemistry, University of Pardubice, nám. Legií 565, CZ-532 10 Pardubice, Czech Republic
  2. Joint Laboratory of Solid State Chemistry of Institute of Macromolecular Chemistry of Czech Academy of Sciences and University of Pardubice, Studentská 84, CZ-532 10 Pardubice, Czech Republic

Abstract

The results and limits in the glass transition study by conventional differential scanning calorimetry (DSC), temperature modulated DSC (MDSC) and StepScan DSC are compared. Bulk glassy As2S3 was used as appropriate model glass. It was found that nonreversing (kinetic) processes affected in fundamental way the results obtained especially by conventional DSC, but indispensable influence on MDSC results was also found. On the other hand no influence of kinetics was observed when StepScan DSC was used. Reversing (thermodynamic) part of StepScan DSC was found to be completely independent on the experimental conditions in the glass transition region. This result has shown that explanation of glass transition phenomenon is still far from being complete.

Keywords

Glass transition, DSC, Temperature modulated DSC, MDSC, StepScan DSC, Arsenic trisulfide.

Citation

Z. ČERNOŠEK, J. HOLUBOVÁ, E. ČERNOŠKOVÁ, Capability of conventional Differential Scanning Calorimetry (DSC), temperature modulated DSC (MDSC) and StepScan DSC for the glass transition phenomenon study, Optoelectronics and Advanced Materials - Rapid Communications, 1, 6, June 2007, pp.277-280 (2007).

Submitted at: April 3, 2007

Accepted at: April 25, 2007