聚苯硫醚(PPS)及其与聚醚醚酮(PEEK)共混物DSC多次升降温扫描表明,同一PPS样品在多次扫描过程中从不同温度下降温结晶,结晶温度(θc)明显不同,归结于PPS自成核作用的存在和其分子结构的变化.共混物中PPS组分的熔点(θmp)虽然有所降低,但由于PEEK对PPS结晶有促进作用,PPS组分θc明显地比纯PPS的高,结晶热与生成结晶的熔融热(结晶度)增加,归结于PPS与PEEK界面相互作用引起高温下异相成核,可结晶部分增加,结晶加快. The DSC scanning of polyphenylene sulfide (PPS) and its blend with polyetheretherketone (PEEK) showed that the same PPS sample crystallized from different temperatures during multiple scanning and the crystallization temperature (θc) was significant , Due to the existence of PPS self-nucleation and the change of its molecular structure. Although the melting point (θmp) of PPS in the blends decreased, PPS had a significant effect on the crystallization of PPS, Is higher than that of pure PPS. The heat of crystallization and the heat of fusion (crystallinity) of the resulting crystals increase, which is attributed to the interphase of PPS and PEEK nucleation, which leads to the heterogeneous nucleation at high temperature and the increase of crystallizable fraction and crystallization.