聚丙烯基纳米复合材料的物理性能

综述了聚丙烯(PP)基纳米复合材料的动态力学性能、结晶性能、阻燃性能、导电性能、分散性等物理性能的国内外研究进展。相对纯高分子材料或传统填充复合材料，聚丙烯纳米复合材料具有快的结晶速率、高的结晶温度和阻燃性能，纳米复合材料中聚丙烯结晶速率和结晶温度的提高归结于高表面积的纳米粒子存在强的异相成核作用，阻燃性能的提高归结于热稳定性提高和在少量填料时就可形成绝缘不燃炭层。

PHYSICAL PROPERTIES OF POLYPROPYLENE NANOCOMPOSITES

The recent research progress of the physical properties of polypropylene/layer, polypropylene/inorganic particle and polypropylene/metal particle nanocomposites was reviewed. Compared to the pure polymer or conventional particulate composites, polypropylene nanocomposites exhibit markedly high modulus and rigidity, faster crystallization rate, higher crystallization temperature and flame retardant properties. The increase in crystallization rate and crystallization temperatures of polypropylene in nanocomposites is attributed to a strong heterogeneous nucleation interaction of nanoparticles due to a very high active surface area. The improvement in flame retardant properties is attributed to their increased thermal stability and their unique ability to promote flame retardancy at quite low filling level through the formation of insulating and incombustible char.