针对聚丙烯(PP)相变纤维加工中的低相变焓、低导热率及高泄露等问题,以聚乙二醇单甲醚(MPEG1000)为相变材料,蒙脱土(MMT)为定形材料,利用熔融插层法制备MPEG1000/MMT定形相变材料,并与PP树脂熔融共混制备PP/MMT/MPEG1000共混体系。采用扫描电镜分析相变材料在共混体系中的分散情况,采用差示扫描量热法分析共混体系的相变性能,采用红外光谱分析共混体系各组分之间的相互作用。结果表明:定形相变材料粒子在PP/MPEG1000/MMT共混体系中分布均匀,粒径在2~5μm左右,相变焓高达21.4 J/g;与PP/MPEG1000共混物对比,PP/MPEG1000/MMT共混体系的相变焓是其3.6倍。定形相变材料的制备有效解决了MPEG1000在PP熔融加工过程中的泄露问题,为PP相变纤维的制备奠定了基础。 Aiming at the problems of low phase change enthalpy, low thermal conductivity and high leakage in the phase change fiber processing of polypropylene (PP), polyethylene glycol monomethyl ether (MPEG1000) as phase change material, montmorillonite (MMT) Materials were prepared by melt intercalation MPEG1000 / MMT phase change material, and melt blending with PP resin to prepare PP / MMT / MPEG1000 blend system. The phase transition materials were analyzed by scanning electron microscopy (SEM). The phase transition properties of the blends were analyzed by differential scanning calorimetry. The interaction between the components of the blends was analyzed by infrared spectroscopy. The results show that the particles of phase change material are uniformly distributed in PP / MPEG1000 / MMT blends, the particle size is about 2 ~ 5μm and the enthalpy of phase transition is as high as 21.4 J / g. Compared with PP / MPEG1000 blends, PP / / MMT blend system is 3.6 times the phase transition enthalpy. The preparation of the phase-change material effectively solves the leakage problem of MPEG1000 during the melt-processing of PP, which lays the foundation for the preparation of PP phase-change fiber.