Miscibility and Crystallization of an Amine-Cured Epoxy Resin Modified with Crystalline Poly(ε-caprolactone)

摘要

Blends of diglicidyl ether of bisphenol-A, DGEBA, and poly(ε-caprolactone), PCL, were cured with 4,4'-diaminodiphenyl sulfone, DDS, and analyzed by differential scanning calorimetry, DSC, in order to study the effect of curing on the miscibility and crystallization behavior of the crystallizable component. The spherulitic morphology of PCL was investigated by thermal microscopy. The results indicate a change in the miscibility state resulting from curing. Likewise, at all the temperatures studied a marked difference in crystallization behavior and morphology between the uncured and the cured systems was observed. These differences are attributed to the multiphase nature of the cured blends versus the homogeneous character of the uncured ones.