汽车用再生聚丙烯材料性能研究

从添加再生材料对新材料力学性能影响的角度出发,研究了不同比例新料聚丙烯(PP)和再生PP(RPP)混合后的力学性能差异,并基于车用外饰材料要求,研究了混合再生材料长周期热老化性能.结果表明,再生材料添加比例小于20％时,对新料的力学性能影响不大;当新料拉伸、弯曲、冲击性能优于再生材料性能时,再生含量越高,混合材料性能越...

Study on Properties of Recycled Polypropylene for Automobile

The tensile and impact properties of polypropylene （PP）/recycled PP（RPP） blends were investigated in terms for the application requirement for automobiles， and their aging properties were also evaluated under the aging condition in a 100 °C hot air for 1 000 h. There was little effect on the tensile strength and impact strength of the blends at weight fractions of RPP less than 20 wt%. The tensile strength and impact strength of the blends decreased with an increase in the content of RPP， when the properties of pristine PP were superior to those of RPP. The blends exhibited a decrease in tensile strength and impact strength at first and then presented an increase trend when their properties were superior to those of RPP. However， the blends presented minimal tensile strength and impact strength at a PP/recycled PP weight ratio of 50∶50. The tensile strength and impact strength presented an upward trend after aging at 100 °C for 1 000 h，especially for the impact strength.