View More View Less
  • 1 Sektion für Kalorimetrie Universität Ulm D-89069 Ulm Germany
  • | 2 Department of Chemistry University of Tennessee 37996-1600 Knoxville TN USA
  • | 3 Fachbereich Physik Universität Rostock Universitätsplatz 3 D-18051 Rostock
Restricted access

The results from temperature modulated DSC in the glass transition region of amorphous and semicrystalline polymers are described with the linear response approach. The real and the imaginary part of the complex heat capacity are discussed. The findings are compared with those of dielectric spectroscopy. The frequency dependent glass transition temperature can be fitted with a VFT-equation. The transition frequencies are decreased by 0.5 to 1 orders of magnitude compared to dielectric measurements. Cooling rates from standard DSC are transformed into frequencies. The glass transition temperatures are also approximated by the VFT-fit from the temperature modulated measurements. The differences in the shape of the curves from amorphous and semicrystalline samples are discussed.

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jan 2021 6 0 0
Feb 2021 4 0 0
Mar 2021 2 0 0
Apr 2021 5 0 0
May 2021 4 0 0
Jun 2021 3 0 0
Jul 2021 0 0 0