Reactive reinforcement of the interface of high performance polymer blendsby PMR-POI

The effect of PMR-polyimide(POI) as the interfacial agent on the interface characteristics, morphology features and crystallization of poly (ether sul fone) /poly (phenylene sulfide) (PES/PPS) and poly(ether ether ketone)/poly (ether sulfone) (PEEK/PES) partly miscible blends were investigated by mea ns of the scanning electron microscopy, WAXD and XPS surface analysis. It i s found that the interfacial adhesion was enhanced remarkably, the size of the dispersed phase particles was reduced significantly and the miscibility was improved by the addition of POI. During melt blending cross-link and/o r grafting reaction of POI with PES, PEEK and PPS homopolymers was detected , however the reaction activity of POI with PPS was much higher than that o f PES and PEEK. It was also found that POI was an effective nucleation agen t of the crystallization of PPS.