Phase separation and morphology development in a thermoplastic-modified toughened epoxy

► Study of the morphology developed by PIPS in thermoplastic-modified epoxy/amine. ► Change in the degree of crosslinking using mixtures of a monoamine and a diamine. ► Study of the effect of cure temperature, modifier amount and degree of crosslinking. ► Establishment of relationships between variables and morphology developed. ► Explanations for the observed trends are proposed and discussed in detail.