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我们开发了一种先进的热塑性复合材料:Kevlar/J～2热塑性复合材料,其基体是一种非晶态聚酰胺共聚物。此技术采用专有技术进行预浸,预浸带可编织成各种不同结构的织物,制成无孔的结构材料,或进一步热成型。除一般热塑性复合材料的工艺特性外,这种织物有很好的铺放性,可在290～305℃、1.4～1.7MPa压力下模压成型或用热压釜工艺成型。由于纤维——基体固有的良好相容性,制品的机械性能很好。该材料的单向带和预浸物的机械性能表明:力学性能的转换性好,纤维体积含量60％时,轴向横量为76GPa,抗拉强度高达1400MPa;横向抗拉强度21MPa。从破坏的断面上看,纤维和基体的粘接非常好。另外,我们对该材料在热/湿环境下的受压、抗剪切,断裂韧性及弯曲性能和抗溶剂性能进行了分析。
We have developed an advanced thermoplastic composite: Kevlar / J ~ 2 thermoplastic composites, the matrix is an amorphous polyamide copolymer. This technology uses proprietary technology for prepreg, prepreg tape can be woven into a variety of different fabrics, made of non-porous structural materials, or further thermoforming. In addition to the general thermoplastic composite process characteristics, this fabric has good laying, can be 290 ~ 305 ℃, 1.4 ~ 1.7MPa pressure molding or autoclave molding process. Due to the inherent good compatibility of the fiber-matrix, the mechanical properties of the product are good. The mechanical properties of unidirectional tapes and prepregs of the material show that the mechanical properties of the material are good and the axial transverse mass is 76GPa, the tensile strength is up to 1400MPa and the transverse tensile strength is 21MPa when the fiber volume content is 60%. From the broken section point of view, the fiber and the substrate bonding is very good. In addition, we analyzed the compression, shear, fracture toughness, flexural and anti-solvent properties of the material under hot / humid conditions.