采用KH-550和KH-570两种不同的偶联剂处理玻璃纤维,得到的玻璃纤维增强铸型(MC)尼龙复合材料(GFRMCN)的力学性能差别很大.经过KH-570处理GFRMCN力学性能降低,而经过KH-550处理能有效提高其力学性能;KH-550质量分数与处理的玻璃纤维质量分数之间符合定量关系式,含量为0.2%时,GFRMCN的弯曲强度提高了35%,弯曲模量提高了72%,拉伸强度提高了46%,弹性模量提高了88%,冲击强度提高了41%.KH-550偶联剂在玻璃纤维与尼龙基体之间形成良好界面结合,达到增强效果;而未经处理的玻璃纤维断裂时从基体中拔出,玻纤与尼龙界面相当于缺陷,使MC尼龙性能下降.
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