Preparation Of PPS/MMT Nanocomposites And Morphology Controlling Of PPS/PA66 Blends By Adding MMT

Poly (p-phenylene sulfide) (PPS) is a semi-crystalline, aromatic polymer with outstanding high temperature stability, inherent flame resistance, and good chemical resistance. However, the applications of neat PPS have been somewhat limited; owing to its relatively low glass translation temperature (T_g) compared to its high melting temperature (T_m) and the inclination to brittleness. Therefore, commercial PPS grades are usually filled with glass fiber.Polymer/clay nanocomposites are increasingly being studied over the last decade due to their demonstrated enhancement in mechanical properties, compared with an unmodified resin, or micro composites. The melt intercalation method has become a main stream for the preparation of the intercalated polymer nanocomposites without in situ intercalative polymerization. Because it is not thermodynamics spontaneous, the formation of nanocomposites by melt-intercalation need to increase the interaction between polymer and clay layers so that the melt intercalation process can occur. In general, the clay is modified with alkylammonium salt to facilitate its interaction with polymers. Some works has been done on the theoretical analysis of thermodynamics and kinetics involved in melt intercalation. The effect of melt processing conditions on the extent of exfoliation has been discussed recently, and the degree of dispersion was interpreted based on the residence time distribution in the extruder and the intensity of shear .So far, most polymers used for preparation of polymer /clay nanocomposites via melt intercalation are with relative low processing temperature(less than 250℃), the...