【摘要】 采用共辐照接枝法合成UHMWPE-g-AA接枝共聚物;采用共混技术制备UHMWPE/PA1010合金。以UHMWPE-g-AA接枝共聚物作为UHMWPE/PA1010合金增容剂。由于PA1010与UHMWPE-g-AA有较强的相互作用,UHMWPE/PA1010合金的冲击强度和断裂伸长率提高,韧性得到改善;同时,这种相互作用限制了PA1010的结晶,使PA1010中正常的结晶含量减少,结晶温度升高。SEM结果表明,增容作用使基体与分散相间界面张力减小,粘结性增强,从而使分散相的粒子尺寸减小,分布更加均匀,拉伸断面显示明显的牵拉现象。共混体系的摩擦系数与纯PA1010相比明显降低,摩擦时在PA1010表面形成完整UHMWPE的润滑膜,使磨耗量减小,摩擦系数降低。更多还原

【Abstract】 UHMWPE-g-AA graft copolymer was synthesized by mutual radiation grafting.UHMWPE/PA1010 alloys were prepared by blending UHMWPE,UHMWPE-g-AA and PA1010.UHMWPE-g-AA graft copolymer serves as compatibilizer in the alloys.Due to the strong interaction between PA1010 and UHMWPE-g-AA,the impact strength and elongation at break of UHMWPE/PA1010 alloys were improved,which indicates the increase of toughness of the alloys.The compatibilization effect limits the crystallization process of PA1010,which leads to the decrease of the normal crystals and the shift of the crystallization temperature to the higher temperature.SEM result shows that the compatibilization reaction decreases the interfacial tension and increases the interfacial strength,which makes UHMWPE disperse in the PA1010 matrix uniformly and in small particle size.The tension phenomenon can be clearly observed.Compared to the pure PA1010,the friction coefficients of the blends decrease.UHMWPE forms an intact protection film on PA1010 surface,which decreases the abrasion loss and the friction coefficients.更多还原