纳米SiO₂/聚苯硫醚和SiO₂-玻璃纤维/聚苯硫醚复合材料的性能

The nano SiO₂/polyphenylene sulfide (PPS) and SiO₂-glass fiber(GF)/PPS composite were prepared to investigate the effects of nano SiO₂ on the properties of PPS and GF/PPS composites. Nano SiO₂ was used to manufacture SiO₂/PPS by melt blending and SiO₂-GF/PPS by hot press molding, and effects were characterized by SEM, DSC, DMA and mechanical tests. The results show that the crystallinity and bending properties of PPS can be improved with nano SiO₂ uniformly dispersing in the matrix by melt blending. The mechanical properties of SiO₂-GF/PPS composite are significantly improved by adding 1wt% nano SiO₂, the interlaminar shear strength increases by 49.4%, the flexural strength increases by 30.6%, and the flexural modulus increases by 14.6%. The addition of nano SiO₂ can improve the glass transition temperature of GF/PPS composite, and the particle can also improve the toughness of resin matrix and hinder the growth of cracks.