Epoxy/poly(benzylmethacrylate) blends: miscibility, phase separation on curing and morphology |
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| Authors: | C. Arribas Rosa M. Masegosa C. Salom E. Arévalo S. G. Prolongo Margarita G. Prolongo |
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| Affiliation: | (1) Departamento Materiales y Producción Aeroespacial, E.T.S.I. Aeronáuticos Universidad Politécnica, Madrid, Spain;(2) Departamento Física y Química aplicadas a la Técnica Aeronáutica, E.U.I.T. Aeronáutica Universidad Politécnica, Madrid, Spain;(3) E.S.C.E.T. Univ. Rey Juan Carlos, Madrid, Spain |
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| Abstract: | Diglycidyl ether of bisfenol-A (DGEBA)/polybenzyl methacrylate (PBzMA) blends cured with 4,4’-diaminodiphenylmethane (DDM) were studied. Miscibility, phase separation, cure kinetics and morphology were investigated through differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Non-reactive DGEBA/PBzMA blends are miscible over the whole composition range. The addition of PBzMA to the reactive (DGEBA+DDM) mixture slows down the curing rate, although the reaction mechanism remains autocatalytic. On curing, initially miscible (DGEBA+DDM)/PBzMA blends phase separate, arising two glass transition temperatures that correspond to a PBzMA-rich phase and to epoxy network. Cured epoxy/PBzMA blends present different morphologies as a function of the PBzMA content. |
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| Keywords: | curing DSC epoxy glass transition morphology poly(benzyl methacrylate) |
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