Thermally stimulated modulus relaxation in polymers: Method and interpretation

Hermann Wagner, Ranko Richert

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We have measured the thermally stimulated decay of the dielectric modulus M(T, t) for poly(vinylacetate) by monitoring the electric field E(t) under the condition of a constant dielectric displacement for t > O. This thermally stimulated polarization experiment is realized by cooling the sample at zero field to well below its glass transition temperature, applying a certain amount of charge, and then recording the voltage of the sample capacitor U(T, t) while ramping the temperature. The result of a temperature invariant distribution of relaxation times observed previously in isothermal experiments allows a direct translation of M(T, t) data into the variation of a characteristic relaxation time τ(T) or of a fictive temperature Tf(T) as a function of the actual temperature.

Original languageEnglish (US)
Pages (from-to)5801-5806
Number of pages6
JournalPolymer
Volume38
Issue number23
DOIs
StatePublished - Nov 1997
Externally publishedYes

Keywords

  • Dielectric relaxation and retardation
  • Glass transition
  • Thermally stimulated discharge

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Thermally stimulated modulus relaxation in polymers: Method and interpretation'. Together they form a unique fingerprint.

Cite this