车用聚丙烯内饰材料耐划伤性能研究

摘要

The content distribution of amide anti-scratch agent on the surface and in the internal of polypropylene scratch-resistance interior material for automobile was investigated by attenuated total reflection infrared spectrum (ATR). The results of ATR and cross cut test showed that the anti-scratch agent could migrate to the surface of material effectively and decreased the coefficient of skin friction, while the content distribution of amide anti-scratch agent on the surface was different from the internal. The ATR and Scanning Electron Microscope (SEM) confirmed that the skin-core morphology of polypropylene interior material. The skin of sample, with the "stick-slip" phenomenon, was damaged seriously without adding anti-scratch agent, but the scratch scar depth of sample with adding anti-scratch was shallow. When the mass fraction of anti-scratch agent was more than 2% , the scratch resistance of material was improved and the color difference ΔL between before-scratching and after-scratching was smaller than 1. The polypropylene scratch-resistance interior material had been applied to automobile interior parts.%采用衰减全反射红外光谱(ATR)研究酰胺类耐划伤剂在车用聚丙烯(PP)耐划伤内饰材料表面和内部的含量分布.ATR及十字划格实验结果表明,酰胺耐划伤剂能有效地迁移到材料表面,降低表面摩擦系数,且酰胺耐划伤剂在材料表面和内部的分布有所差异.ATR及扫描电子显微镜(SEM)证明车用PP耐划伤内饰材料呈皮芯结构,未加入耐划伤剂的试样表层受到严重划伤,出现了粘滑现象,而加入酰胺耐划伤剂的试样划痕深度较浅.当耐划伤剂质量分数超过2％时材料的耐划伤性能得到提高,划伤前后的色差ΔL＜1,该PP耐划伤内饰材料已成功用于各种汽车内饰件.