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GF/PP复合纱针织物预型件的线圈密度对复合材料拉伸性能的影响

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Keywords: GF/PP复合纱,线圈密度,GF/PP复合材料,拉伸

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Abstract:

研究了由GF/PP复合纱编织而成的1+1罗纹针织物预型件的线圈密度对热压成型后的玻璃纤维针织物增强聚丙烯复合材料拉伸性能的影响。对6种由不同线圈密度的GF/PP复合纱1+1罗纹针织物预型件经热压得到的复合材料进行的拉伸性能测试研究表明:随着复合纱针织物预型件线圈密度的逐渐增大,复合成型后的复合材料的拉伸强度先逐渐增大,而后稍有降低;断裂伸长的变化趋势则恰恰相反。光学显微镜和扫描电镜照片研究表明:随着针织物预型件线圈密度的增大,成型后的复合材料的空隙率减小,纤维/基体分布更加均匀;与此同时,线圈的曲率半径减小,玻璃纤维脆断现象加剧。

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