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Modeling of chemorheology of thermoset cure by modified WLF equation
Author(s) -
Mijovic Jovan,
Lee Chee Hung
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070370404
Subject(s) - thermosetting polymer , epoxy , diglycidyl ether , materials science , rheology , thermodynamics , glass transition , polymer chemistry , polymer science , bisphenol a , composite material , polymer , physics
An analysis of chemorheology of cure of a formulation composed of diglycidyl ether of bisphenol‐A (DGEBA) type epoxy resin and a mixture of aromatic amines was performed. A series of kinetic and rheological tests were run, and the experimentally obtained results were checked against the proposed model. A modified form of the classical Williams–Landel–Ferry (WLF) equation was used to model the chemorheology of the formulation. To arrive at the appropriate form of the modified WLF equation, expressions were developed for (i) the cure kinetics, (ii) the glass transition temperature as a function of the degree of cure, and (iii) the changes in parameters C 1 and C 2 as a function of temperature. By using these correlations in conjunction with the WLF equation, good agreement between predicted and experimental findings was observed.