以PP(聚丙烯)为基体材料,分别添加发泡剂母粒、发泡剂和助剂母粒及发泡剂、助剂、成核剂母粒,在二次开模条件下注塑制备微发泡PP复合材料,分析了发泡助剂及成核剂对微发泡复合材料发泡行为的影响规律.结果表明,添加发泡助剂以后,PP体系的发泡质量得到明显改善;助剂和成核剂同时添加,微发泡PP体系的发泡质量最好,泡孔平均直径为26.79 μm,泡孔密度达到4.76×106个/cm3.%By taking PP as basic materials, foaming agent master batch,foaming agent and additives,foaming agent and additives and nucleating agent respectively was added into polypropylene. The microcellular foam PP composites was made under the condition of twice-open mold. The effect rule of additives and nucleating agent on foaming behavior was analyzed in microcellular foam composites. The results show that foaming quality of PP system is improved significantly after adding additives. There is the most ideal foaming effects in microcellular foam composites after adding promoter and nucleating agent. The cell diameter is 26.79 μm and cell density is 4. 76×106 cells/cm3.
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