Effect of aminosiloxane modifier on chemorheological properties of Ortho-cresol novolac epoxy

Jin Kim Yun, Byeng Gil Ahn, Nyun Kim Woo, Kwang S. Suh, Gun Kim Whan, Gyu Yoon Ho

Research output: Contribution to journalArticle

Abstract

The effect of aminosiloxane modifier on the chemorheological properties of ortho-cresol novolac epoxy/phenol novolac/triphenylphosphine resin system was investigated at different isothermal curing temperatures. By adding the aminosiloxane to the resin system, not only conversion rate and conversion were increased but also glass transition temperature was promoted. Critical conversion and gelation time obtained at the crossover point between storage and loss moduli were reduced and thus the viscosity was increased by the aminosiloxane. C 1 and C 2 in the WLF equation calculated from the glass transition temperature as a function of conversion and measured viscosity were found to vary with the curing temperature. By applying the change of glass transition temperature with conversion, C 1 and C 2 to WLF equation, it was possible to predict accurately the viscosity change with isothermal curing reaction.

Original languageEnglish
Pages (from-to)88-97
Number of pages10
JournalPolymer (Korea)
Volume26
Issue number1
Publication statusPublished - 2002 Jan

Keywords

  • Aminosiloxane
  • Chemorheology
  • Curing reaction
  • Glass transition temperature
  • Modified WLF equation
  • Ortho-cresol novolac epoxy

ASJC Scopus subject areas

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

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