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传统的橡胶或热塑性弹性体虽然可以有效改善PA66的韧性,但是所带来的强度、刚度、热变形温度的损失大大影响了材料的实际应用,采用3种新型的超细弹性体———超细全硫化粉末丙烯酸酯橡胶(以下简称UFAPR)、超细全硫化粉末丁腈橡胶(以下简称UFNPR),超细全硫化粉末羧基丁腈橡胶(以下简称UFXPR),增韧增强PA66,对PA66及其共混物的动态力学性能等做了全面的研究,结果表明:胶粉的加入降低了动态损耗模量峰的位置,使其向低温偏移,材料的韧性得以提高;同时损耗峰的强度有一定程度的降低,结晶度提高,从而导致力学性能提高。
Although the traditional rubber or thermoplastic elastomer can effectively improve the toughness of PA66, but the strength, stiffness and heat distortion temperature loss greatly affect the practical application of materials, the use of three kinds of new superfine elastomer --- super Fine vulcanized powder acrylic rubber (hereinafter referred to as UFAPR), ultrafine fully vulcanized powder nitrile rubber (hereinafter referred to as UFNPR), ultrafine fully vulcanized powder carboxylated nitrile rubber (hereinafter referred to as UFXPR), toughening enhanced PA66, PA66 and The results show that the addition of powdered rubber reduces the peak of dynamic loss modulus and makes it shift to low temperature, and the toughness of the material can be improved. Meanwhile, the intensity of the loss peak A certain degree of reduction, increased crystallinity, resulting in improved mechanical properties.