Improved surface quality and hygrothermal performance of epoxy based prepreg by liquefied dicyandiamide with enhanced solubility and dispersibility

Liquefied dicyandiamide (L-DICY) was fabricated by pretreatment of DICY with polyetheramine (PEA)/diglycidyl ether of bisphenol A (DGEBA) adduct, and physicochemical properties of L-DICY, mechanical, thermal and optical properties of L-DICY cured epoxy resins and hygrothermal performance of L-DICY cured epoxy based prepregs were evaluated to compare with those of DICY and PEA/DICY blends. Amine hydrogen equivalent weight of L-DICY was increased...