Diglycidyl terminated 4,4'‐oxydiphenyl cured with an aromatic diamine exhibits liquid crystalline properties, even if the amount of hardener is used in defect with respect to the stoichiometric amount. Physical properties of the resin, hardened with different quantities of amine are presented and discussed. In particular the high values of fracture toughness of this class of thermoset has been explained on the basis of the biphasic nature of the crosslinked resin. The differences in mechanical properties are analyzed taking into account the different crosslink densities.
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Carfagna et al. (1999) studied this question.
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