为了改进上述缺点，扩大其应用领域，并更好的满足对使用性能的要求，人们采用多种方法对PA66进行改性，以改进PA66塑料的冲击性、热变形性、成型加工性能及耐化学腐蚀性能..
沿革早工业化生产的聚酰胺品种是聚酰胺66（即尼龙66），美国杜邦公司W.H.卡罗瑟斯于1937年公布了个专利，制得聚酰胺纤维（尼龙丝）样品，1938年建立了试验工厂，1939年工业化生产装置投入运转。当时聚酰胺主要用于生产纤维、绳索和包覆材料。第二次世界大战中这些材料在军事方面的应用得到了很大发展，战后生产了薄膜和塑料。1941年，聚酰胺6在德国投入生产，随后又开发了聚酰胺610。1950年法国开发了聚酰胺11。1958年试制成功聚酰胺1010，苏联试制成功共聚酰胺。1966年，在联邦德国赫斯化学公司大规模生产聚酰胺12。1972年，美国杜邦公司又实现了芳香族聚酰胺的工业生产。70年代以后，聚酰胺的改性引起人们的极大兴趣，特别是石油化工的发展，聚酰胺的原料路线转向石油，成本逐年下降，产量逐年增长，使聚酰胺发展成为一类品种多、能够适应于多种用途的高分子材料。俗称尼龙-66。一种热塑性树脂。白色固体。密度1.14。熔点253℃。
In order to improve the aboveshortcomings, expand its application fields, and better meet therequirements for performance, various methods have been used tomodify PA66 plastics to improve their impact resistance, thermaldeformation, forming and processing properties, and chemicalcorrosion resistance
The early industrial productionof polyamide is polyamide 66 (i.e. nylon 66). In 1937, the AmericanDuPont company W.H. Carousels published a patent to preparepolyamide fiber (nylon silk) samples. In 1938, a pilot factory wasestablished, and in 1939, the industrial production equipment wasput into operation. At that time, polyamide was mainly used forproducing fibers, ropes, and wrapping materials. During World WarII, the military applications of these materials developed greatly,with the production of films and plastics after the war. In 1941,polyamide 6 was put into production in Germany, followed by thedevelopment of polyamide 610. In 1950, France developed polyamide11. In 1958, polyamide 1010 was successfully trial-produced, andthe Soviet Union successfully trial-produced copolyamide. In 1966,polyamide 12 was produced on a large scale at Hess Chemical Companyin Federal Germany. In 1972, DuPont Corporation in the UnitedStates achieved industrial production of aromatic polyamides. Afterthe 1970s, the modification of polyamide aroused great interest,especially in the development of petrochemical industry. The rawmaterial route of polyamide shifted to petroleum, with costsdecreasing year by year and production increasing year by year.This led to the development of polyamide as a type of highmolecular material with a wide variety of varieties andadaptability for various purposes. Commonly known as nylon 66. Athermoplastic resin. White solid. Density 1.14. Melting point 253℃.
