Chemorheology of epoxy resin Part I epoxy resin cured with tertiary amine
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Epoxy resin was cured with a tertiary amine. The viscosity and dynamic mechanical properties during the curing reaction were measured by a cone-and-plate rheometer. A dual Arrhenius viscosity model was modified to predict the viscosity profile before gelation during the non-isothermal curing. The viscosity profile coincided with the experimental data. The activation energy of this system calculated using the modified model was 19.8 kcal mol−1 for the first region, and 17.3 kcal mol−1 for the second region. After gelation, the dynamic complex modulus was related to the reaction kinetics according to the rubber elasticity theory, and the activation energy was 15.3 kcal mol−1. Furthermore, the gelling point can be estimated from the rheological measurements.
KeywordsViscosity Activation Energy Epoxy Rubber Reaction Kinetic
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- 1.C. A. May, in “Epoxy Resins-Chemistry and Technology” edited by C. A. May (Dekker, New York, 1988) p. 1.Google Scholar