汽车塑料是当今世界汽车工业发展的重要方面之一。它对节约能源、降低消耗、降低汽车生产成本,保护环境都有着重要的意义。 聚丙烯(PP)具有良好的机械性能、比重轻、原料丰富、价格便宜,是汽车用塑料的首选材料,但是聚丙烯收缩率大,容易造成产品尺寸稳定性差,同时韧性差,特别是低温特性 Automotive plastic is one of the important aspects of the automotive industry in the world today. It is of great significance for saving energy, reducing consumption, reducing vehicle production costs and protecting the environment. Polypropylene (PP) has good mechanical properties, light weight, abundant raw materials, and low price. It is the first choice of plastic materials for automobiles. However, PP shrinkage is large, which may result in poor dimensional stability and poor toughness, especially low temperature