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热固性聚三唑树脂(PTA)具有突出的力学、热学性能,分子可设计性强,工艺性好,可与多种增强纤维复合制成高性能复合材料。通过浇注体研究了一种热固性PTA树脂的力学、热学性能,固化体系玻璃化温度接近200℃。采用扫描电镜(SEM)、单向板、NOL环等方法,对T-700炭纤维/PTA树脂复合材料性能及粘接界面进行了系统研究。结果表明,复合材料的拉伸、压缩性能与T-700炭纤维/E-51环氧树脂复合材料相当,剪切性能低20%~40%。通过SEM对复合材料粘接界面分析,破坏断面“拔出”纤维表面光滑,挂胶较少,界面粘接相对薄弱是影响复合材料性能的主要因素。
Thermosetting poly-triazole resin (PTA) with outstanding mechanical and thermal properties, molecular design, process is good, with a variety of enhanced fiber composite made of high-performance composite materials. The mechanical and thermal properties of a thermosetting PTA resin were studied by pouring. The glass transition temperature of the cured system was close to 200 ℃. The properties of T-700 carbon fiber / PTA resin composite and the bonding interface were systematically studied by scanning electron microscope (SEM), unidirectional plate and NOL ring. The results show that the tensile and compressive properties of composites are equivalent to that of T-700 carbon fiber / E-51 epoxy composites, and the shear properties are 20% -40% lower. Through the SEM analysis of the interface of the composite material, the failure of the “pull-out” fiber surface is smooth, the adhesive is less, and the relative weakness of the interface bonding is the main factor affecting the performance of the composite material.