Studies on cure kinetics and rheological properties of difunctional epoxy/polysulfone blend system

Soo Jin Park, Hyun Chel Kim, Jae Rock Lee

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this work, the cure kinetics and Theological properties of difunctional epoxy (diglycidylether of bisphenol A, DGEBA)/polysulfone (PSF) blends were investigated using differential scanning calorimeter and rheometer. From the DSC results of the blends, the temperature of the exothermic peak and cure activation energy (Ea) using a half-width method were increased with increasing the PSF content to neat epoxy resin up to 30 wt%. However, a marginal decrease in the blend system was shown in Ea. The conversion (a) and conversion rate (dα/dt) were decreased as the content of PSF increases. Rheological properties of the blend system were investigated under isothermal condition using a rheometer. Cross-linking activation energy (Ec) was determined from the Arrhenius equation based on gel time and curing temperature. As a result, the Ec showed a similar behavior with Ea, which could be resulted from high viscosity of PSF and the phase separation between DGEBA and PSF.

Original languageEnglish
Pages (from-to)177-185
Number of pages9
JournalPolymer (Korea)
Volume25
Issue number2
StatePublished - 2001
Externally publishedYes

Keywords

  • Cure kinetics
  • Difunctional epoxy
  • Polysulfone
  • Rheological properties

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