Abstract: The phase separations of epoxys resin modified with phenyl terminated and fluorocarbon chain polyetherimide at different temperature has been studied by using DSC, SEM and time-resolved light scattering(TRLS). It was found that for F-blend, the phase separation occurred and curing rate and phase separation rate were slower than those for P-blend which leads to smaller periodic distance. As the temperature increased, the larger periodic distance resulting from the higher phase separation rate and the difference between the two systems caused by fluorocarbon terminated chain became smaller. It suggests that the phase structure can be controlled by lowering the surface energy of polyetherimide and it is a possible way to obtain co-continuous structure with a smaller periodic distance.

Key words: Fluorocarbon chain terminated polyetherimide, Epoxy resin, Temperature effect, Phase separation