尼龙/聚氨酯共混材料的研究进展

Progress on the Preparation of Polyamide/Thermoplastic Polyurethane Elastomer Blends

尼龙的弯曲强度、耐磨、耐蠕变等性能非常突出,但在低温及干态下冲击强度较低,吸水率高。针对这些不足的增韧改性研究很多。在尼龙基体中加入一定量的橡胶或弹性体,能使其冲击强度显著提高。增韧改性可以使尼龙树脂的抗冲击性能和耐低温性能明显改善,并拓宽其应用领域。文中对近年来尼龙与弹性体复合改性的方法进行了概括,特别阐述了尼龙与聚氨酯的共混改性进展,并提出了使用氨纶废丝增韧尼龙的新方法。

Due to the outstanding performance in bend, anti-abrasion and anti-creep, nylon, one of the most important engineering plastic, has a broad use in industry. But high water adsorption and low impact strength in dry state and low temperature are two important factors to restrict application of nylon. Blending nylon with appropriate flexibilizers is an effective and efficient way t0 make up these two defects, and much research work has been done in this area. Adding a certain amount of rubber and elastomer into nylon will significantly improve its impact strength,i which will definitely expand application fields of nylon. In this paper, the methods for the toughness modification of nylon, especially the progress of blending with thermoplastic polyurethane elastomer （TPU）, were reviewed. Furthermore, a new way for toughening of nylon, modified with abandoned spandex, was proposed.