Dielectric properties of an epoxy-amine system at a high microwave frequency

Liming Zong, Shuangjie Zhou, Nikki Sgriccia, Martin C. Hawley, Rensheng Sun, Leo C. Kempel

Research output: Contribution to journalArticle

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Abstract

The dielectric properties of a curing diglycidyl ether of bisphenol A (DGEBA)/Jeffamine D-230 system have been studied over the temperature range of 20-90°C at 2.45 GHz. It was found that, generally, both the dielectric constant and the dielectric loss factor of the system increased with temperature and decreased as the reaction proceeded. The epoxy resins at different extents of cure exhibited the γ relaxation, which can be described by the Arrhenius Rate Law. The relaxation is attributed to the motions of the dipolar groups associated with the reactants. The Davidson-Cole model can represent the temperature dependencies of the dielectric properties. The nature of the information yielded by dielectrometry on the dynamics of the system is discussed. The evolution of the parameters of the models during the polymerization was mainly affected by the decreasing number of the dipolar groups involved in the reaction and increasing medium viscosity.

LanguageEnglish (US)
Pages1576-1580
Number of pages5
JournalPolymer Engineering and Science
Volume45
Issue number12
DOIs
StatePublished - Dec 2005

Profile

Microwave frequencies
Dielectric properties
Amines
Epoxy Resins
Dielectric losses
Epoxy resins
Temperature
Curing
Ethers
Permittivity
Polymerization
Viscosity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Dielectric properties of an epoxy-amine system at a high microwave frequency. / Zong, Liming; Zhou, Shuangjie; Sgriccia, Nikki; Hawley, Martin C.; Sun, Rensheng; Kempel, Leo C.

In: Polymer Engineering and Science, Vol. 45, No. 12, 12.2005, p. 1576-1580.

Research output: Contribution to journalArticle

Zong, Liming ; Zhou, Shuangjie ; Sgriccia, Nikki ; Hawley, Martin C. ; Sun, Rensheng ; Kempel, Leo C./ Dielectric properties of an epoxy-amine system at a high microwave frequency. In: Polymer Engineering and Science. 2005 ; Vol. 45, No. 12. pp. 1576-1580
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