A comparison of chemorheological models for thermoset cure

Jovan Mijović; Chee Hung Lee

doi:10.1002/app.1989.070381201

A comparison of chemorheological models for thermoset cure

Jovan Mijović, Chee Hung Lee

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A chemorheological study of a thermoset system consisting of diglycidyl ether of bisphenol‐A (DGEBA) epoxy resin and a mixture of two armoatic amine curing agents; 4,4′ methylenedianiline (MDA) and m‐phenylene diamine (m‐PDA), was conducted. Experimentally obtained viscosity data were checked against the predictions of two different viscosity models; one based on a phenomenological equation obtained by modification of the classical Williams–Landel–Ferry (WLF) equation and the other based on an extension of the branching theory originally proposed by Flory. In general, the predictions of both models were in excellent agreement with experimentally obtained isothermal and dynamic viscosity data. The branching theory model was found to have a slight advantage over the phenomenological equation model in describing the viscosity prior to gelation in a fast heating cure cycle.

Original language	English (US)
Pages (from-to)	2155-2170
Number of pages	16
Journal	Journal of Applied Polymer Science
Volume	38
Issue number	12
DOIs	https://doi.org/10.1002/app.1989.070381201
State	Published - Dec 20 1989

ASJC Scopus subject areas

General Chemistry
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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10.1002/app.1989.070381201

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AB - A chemorheological study of a thermoset system consisting of diglycidyl ether of bisphenol‐A (DGEBA) epoxy resin and a mixture of two armoatic amine curing agents; 4,4′ methylenedianiline (MDA) and m‐phenylene diamine (m‐PDA), was conducted. Experimentally obtained viscosity data were checked against the predictions of two different viscosity models; one based on a phenomenological equation obtained by modification of the classical Williams–Landel–Ferry (WLF) equation and the other based on an extension of the branching theory originally proposed by Flory. In general, the predictions of both models were in excellent agreement with experimentally obtained isothermal and dynamic viscosity data. The branching theory model was found to have a slight advantage over the phenomenological equation model in describing the viscosity prior to gelation in a fast heating cure cycle.

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A comparison of chemorheological models for thermoset cure

Abstract

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