高速铁路绝缘轨距块用增强尼龙专用料研究

Research on high-speed rail insulated gauge blocks with reinforced nylon

以尼龙(PA)为基体树脂,通过不同黏度的PA复合,优化选择了具有较好加工性能和机械强度的基体材料。同时,选择不同直径的玻璃纤维,研究玻璃纤维种类和含量对复合材料性能的影响,对比普通玻璃纤维和无碱玻璃纤维对复合材料的耐醇解性能影响,使复合材料具有优异的耐高温性能和较好的耐醇解性能。为了提高抗氧剂的物理损耗性能,制备了纳米二氧化硅表面负载抗氧剂,并采用红外光谱法研究了接枝结构。

The matrix composite materials with good process performance and high mechanical strength were prepared by b/ending nylon in different viscosities and glass fiber in different diameters. The effects of diameter, type and content of the glass fibers on composite properties were studied. The resistance to alcoholysis performances of ordinary glass and E-glass fiber were compared. The experimental results indicated that the composites have excellent high temperature resistance and good tolerance to alcoholysis. In order to improve the performance of the physical loss of antioxidants, the antioxdants loading on the surface of nano-silica particles were prepared and the graft structure was studied with infrared spectroscopy.