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The chemo‐rheological behavior has been elucidated for three high temperature epoxy resins. Constant temperature and shear stress measurements were made on a modified Weissenberg Rheogoniometer. Curing behavior of various temperatures is unified by a time‐temperature superposition method. The curing rate of one resin, Ferro E‐293, is limited by the chemical reaction. The other resins, 3M PR‐286 and PR‐288, each have consecutively occurring reactions, both of which are diffusion limited. The chemo‐rheological information obtained for these materials is used to model viscosity for compression molding of hand‐laidup composites.
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Ronald P. White (1974) studied this question.
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