Thermally stimulated modulus relaxation in polymers: Method and interpretation

Hermann Wagner, Ranko Richert

Research output: Contribution to journalArticle

35 Citations (Scopus)

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
StatePublished - Nov 1997
Externally publishedYes

Fingerprint

Polymers
Relaxation time
Temperature
Temperature distribution
Capacitors
Permittivity
Experiments
Electric fields
Polarization
Cooling
Monitoring
Electric potential
Glass transition temperature

Keywords

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

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Thermally stimulated modulus relaxation in polymers : Method and interpretation. / Wagner, Hermann; Richert, Ranko.

In: Polymer, Vol. 38, No. 23, 11.1997, p. 5801-5806.

Research output: Contribution to journalArticle

@article{f47046280c0747b482efa146e0e9b22d,
title = "Thermally stimulated modulus relaxation in polymers: Method and interpretation",
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.",
keywords = "Dielectric relaxation and retardation, Glass transition, Thermally stimulated discharge",
author = "Hermann Wagner and Ranko Richert",
year = "1997",
month = "11",
language = "English (US)",
volume = "38",
pages = "5801--5806",
journal = "Polymer (United Kingdom)",
issn = "0032-3861",
publisher = "Elsevier BV",
number = "23",

}

TY - JOUR

T1 - Thermally stimulated modulus relaxation in polymers

T2 - Method and interpretation

AU - Wagner, Hermann

AU - Richert, Ranko

PY - 1997/11

Y1 - 1997/11

N2 - 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.

AB - 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.

KW - Dielectric relaxation and retardation

KW - Glass transition

KW - Thermally stimulated discharge

UR - http://www.scopus.com/inward/record.url?scp=0031270436&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031270436&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031270436

VL - 38

SP - 5801

EP - 5806

JO - Polymer (United Kingdom)

JF - Polymer (United Kingdom)

SN - 0032-3861

IS - 23

ER -