The mechanical properties of three typical high performance thermoplastic engineering plastics, glass fiber reinforced polyetherimide GF30-PEI, polyarylate GF30-PAR and polyamide GF30-PA were tested respectively as well as the adhesion and surface resistivity of the conductive coatings to meet the requirements of the integrated engineering application system design of the high performance engineering plastics used for the radar structure and function parts. The mechanism of glass fiber reinforcing in engineering plastics was analyzed via scanning electron microscope. The results show that tensile strength of GF30-PAR is 235 MPa, yield strength is 183 MPa, bending strength is 321 MPa, Poisson's ratio is 0.35. The coating adhesion reaches 4B level, the surface conductivity is small when coating thickness is 25μm. GF30-PAR has the optimum performance as the base materials.%依据高性能工程塑料在雷达结构和功能件上的一体化工程应用体系设计要求,分别测试了玻璃纤维增强的聚醚酰亚胺(GF30-PEI)、聚芳酯(GF30-PAR)和聚酰胺(GF30-PA)3种典型高性能热塑性工程塑料的力学性能,以及导电涂层附着力、表面电阻率等,并利用扫描电子显微镜分析了玻璃纤维在工程塑料中的增强作用机理.结果表明:GF30-PAR的抗拉强度为235 MPa、屈服应力为183 MPa、弯曲应力为321 MPa、泊松比为0.35;涂层附着力达到4B级;涂层厚度为25μm时,表面电导率较小,GF30-PAR因具有较优的性能而作为基体材料.
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