半芳香族耐高温聚酰胺的制备及性能
武嘉1，田国锋1，罗金华1，张岳1，李迎春2
1.山东东辰瑞森新材料科技有限公司，济南 250014； 2.中北大学材料科学与工程学院，太原 030000
Preparation and Properties of Semi-Aromatic High-Temperature Resistant Polyamide
Wu Jia1, Tian Guofeng1, Luo Jinhua1, Zhang Yue1, Li Yingchun2
1.Shandong Dongchen Ruisen New Material Technology Co.,Ltd.,Jinan 250014,China; 2.School of Materials Science and Engineering,North University of China,Taiyuan 030000,China
摘要：为满足电子电器、汽车涡轮增压发动机等对聚酰胺(PA)耐高温性能提出的更高要求，开发了一种能够获得各种黏度的耐高温聚酰胺(PA6T/66)树脂的工艺 ，该工艺简单，耗能低 ，环保安全。首先 ，利用熔融法和固相增黏法相结合的方式制备了不同黏度的 PA6T/66，此时树脂黏度较高 。 其次，PA6T/66 树脂在一定温度和真空度下增黏至所要求的黏度。探究了不同 pH 条件下制备的对苯二甲酸己二胺 (6T)盐的形貌与颜色；研究了不同 pH 下制备的 6T 盐与己二酸己二胺(66)盐、聚合压力、聚合时间、封端剂用量 、树脂增黏时间等对 PA6T/66 树脂相对黏度的影响。结果表明，各种 pH 条件下制备的无水 6T 盐为白色结晶状粉末 ；当 6T 盐与 66 盐质量比为 55∶45 时 ，PA6T/66 树脂的熔点为307 ℃；聚合压力为 2.35 MPa，聚合时间为 3 h，封端剂占总盐质量 0.1%，增黏时间为 6 h 时，制备的 PA6T/66 树脂达到玻纤增强、电子电器应用的要求。
Abstract：In order to meet the higher requirements of high temperature resistance of polyamide (PA) in electronic appliances, automobile turbocharged engines, etc., a process for obtaining high temperature resistant polyamide ( PA6T/66 ) resin with various. viscosities was developed. The process is simple, low energy consumption, environmental protection and safety Firstly, PA6T/66 with different viscosities was prepared by combining melting method and solid-phase viscosity enhancement method, and the resin viscosity was high. Secondly, the resin was tackled to the required viscosity at a certain temperature and vacuum. The morphology and color of hexanediamine terephthalate (6T) prepared under different pH conditions were explored. The effects of 6T salt and hexa‐ methylene adipate (66) salt prepared at different pH, polymerization pressure, polymerization time, amount of capping agent, and resin thickening time on the relative viscosity of PA6T/66 resin were studied. The results show that the anhydrous 6T salt prepared under various pH conditions is white crystalline powder. When the mass ratio of 6T salt to 66 salt is 55∶45, the melting point of the PA6T/66 resin is 307 ℃; When the polymerization pressure is 2.35 MPa, the polymerization time is 3 h, the end capping agent accounts for 0.1% of the total salt mass, and the tackification time is 6 h, the prepared PA6T/66 resin meets the requirements of glass fiber reinforcement and electronic and electrical applications.
关键词：聚酰胺；耐高温；黏度；封端剂
Keywords：polyamide; high temperature resistance; viscosity; capping agent
基金：山东省自然科学基金项目(ZR2020QB115)
本文引用格式：
武嘉，田国锋，罗金华，等.半芳香族耐高温聚酰胺的制备及性能[J].工程塑料应用，2023，51(8)：21-25.
Wu Jia，Tian Guofeng，Luo Jinhua，et al. Preparation and properties of semi-aromatic high-temperature resistant polyamide[J]. EngineeringPlastics Application，2023，51(8)：21-25.
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