芳纶纤维增强尼龙6复合材料的制备与性能

Preparation and Property of Aramid Fiber Reinforced Nylon-6 Composite

采用毛细管流变仪和差示扫描量热仪研究了尼龙6的热性能和流变特性,确定了芳纶纤维增强尼龙6复合材料的热压成型温度;制备了芳纶纤维增强尼龙6复合材料,研究了其微观结构和力学性能,并采用相控阵超声检测技术进行了无损检测。结果表明:芳纶纤维增强尼龙6复合材料的热压成型温度为245℃;尼龙6对芳纶纤维的浸渍效果较好,无损检测均未发现复合材料内部存在缺陷;复合材料的静态抗拉强度为279.7 MPa,其动态压缩强度和压缩模量均随应变速率的增加而增大,在高应变速率下呈脆性破坏。

The thermal property and rheological behavior of nylon-6 were studied using capillary rheometer and differential scanning calorimeter and the hot press forming temperature of aramid fiber reinforced nylon 6 composite was determined. Then the aramid fiber reinforced nylon 6 composite was prepared and the microstructure and mechanical properties were studied. Nondestructive testing of the composite was also conducted using ultrasonic phased array technology. The results show that the hot press forming temperature of the aramid fiber reinforced nylon-6 composite was 245 ~C. The impregnating effect of nylon-6 on aramid fiber was relatively good. No defects were found in the composite by the nondestructive testing. The static tensile strength of the composite was 279.7 MPa and both the dynamic compressive strength and compression modulus increased with the increase of strain rate. The composite showed a brittle failure at a high strain rate.