氰乙基三氯硅烷衍生物改性玻璃纤维增强PA6的应用及性能表征

Application and Characterization of Glass Fiber Reinforced PA6 Modified with a Cyanoethyltrichlorosilane Derivative

以氰乙基三氯硅烷为初始反应物合成氰乙基三乙酰氧基硅烷(N1-A),并将其应用于玻璃纤维(GF)的表面改性处理,再通过双螺杆挤出机将改性玻纤与尼龙6(PA6)共混制备了玻璃纤维增强尼龙6复合材料(PA6/GF)。考察了硅烷偶联剂N1-A处理液质量分数对复合材料力学性能的影响,并将其与氨基硅烷KH550改性玻纤及市售玻纤进行应用对比。结果表明:硅烷偶联剂N1-A可以与玻璃纤维发生反应,经过硅烷偶联剂N1-A处理过的玻纤与PA6基体的粘接能力更强,硅烷偶联剂N1-A处理液质量分数对处理效果有影响。复合材料的力学性能随硅烷偶联剂N1-A处理液质量分数的升高,先升高后降低,硅烷处理液的最佳质量分数为0.50%,经硅烷偶联剂N1-A处理的玻纤制备的复合材料比经KH550处理的玻纤及市售玻纤制备的PA6/GF复合材料具有更好的综合力学性能。

Cyanoethyltriacetoxysilane(N1-A)was synthesized with cyanoethyltrichlorosilane as the initial reactant and used for the surface modification of glass fibers(GF).Then the modified glass fibers were blended with Nylon 6(PA6)to prepare glass fiber reinforced Nylon 6 composite(PA6/GF)by a twin-screw extruder.The effects of the mass fraction of the finishing solution containing silane coupling agent N1-A on the mechanical properties of the composite were investigated,and the application of so-modified glass fibers was compared with those of amino silane KH550 modified glass fibers and marketed glass fibers.The results showed that silane coupling agent N1-A could react with glass fibers.The glass fibers finished with silane coupling agent N1-A had stronger bonding performance with PA6 matrix,and the mass fraction of the finishing solution had some influence on the finishing effect.With the increase of the mass fraction of the finishing solution,the mechanical properties of the composite first increased and then decreased.The optimal mass fraction of the finishing solution was 0.50%.The composite made from glass fibers finished with silane coupling agent N1-A had better comprehensive mechanical properties than PA6/GF composites made from KH550 finished glass fibers and marketed glass fibers.