Preparation and characteristic research on composites of polyphenylene sulfide modified by nano-silicon dioxide

Pure PPS was modified by nano-SiO₂, and mixed with SBS, PPA auxiliaries and smoke suppression agent. The compound materials were tested on dispersion homogeneity of nano-SiO₂, water absorption, mechanics function, TEM and thermal properties. It discovered that the nano-SiO₂ was homogeneous in PPS and it could decrease the water absorption rate and the temperature coefficient of expansion and improve the mechanical and thermal properties, as well as the performance life. The composite materials really satisfy the strict index demands of electron packing materials.