通过将一种半结晶性的聚酰亚胺树脂采用热压成型的方式制得了高性能的工程塑料。首先,对它的力学性能包括拉伸性能、压缩性能、弯曲性能、冲击性能及剪切性能进行了测试。结果表明,其具有优异的机械性能,可应用于高温环境。由于拉伸试验的测试温度分别为25、250和280℃,因此,在拉伸过程中,晶体的生长会受到温度和力的双重作用,进而在样品中有残余应力 A high-performance engineering plastic is obtained by thermoforming a semi-crystalline polyimide resin. First of all, its mechanical properties including tensile properties, compression properties, bending properties, impact properties and shear properties were tested. The results show that it has excellent mechanical properties, can be applied to high temperature environment. As the tensile test test temperatures were 25,250 and 280 ℃, therefore, in the tensile process, the crystal growth will be the dual role of temperature and force, and then in the sample residual stress