In this study,the effects of nanodiamond(ND)and graphene microchip(GNP)on the crystallization behavior and thermal properties of polyphenylene sulfide(PPS)were investigated.PPS/ND and PPS/GNP composites were prepared by melt blending,and it was found that the addition of nD and GNP significantly increased the crystallization temperature and accelerated the crystallization rate of PPS.