Kevlar and glass fiber treatment for thermoplastic composites by step polycondensation
Kevlar and glass fiber treatment for thermoplastic composites by step polycondensation
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DOI：
10.1002/pc.20307
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发表时间：
2007-06
影响因子：
5.2
通讯作者：
H. Salehi‐Mobarakeh;S. Nakata;A. Ait-Kadi;J. Brisson
中科院分区：
文献类型：
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作者：
H. Salehi‐Mobarakeh;S. Nakata;A. Ait-Kadi;J. Brisson
Nylon-6,6 接枝在玻璃和等离子处理的 Kevlar 纤维的表面，用于尼龙-Kevlar 热塑性复合材料。纤维表面会出现羟基端基，对于凯夫拉纤维，胺端基会作为缺陷或由于等离子体处理而出现。这些被用作尼龙-6,6 步缩聚的锚点。将纤维连续浸入己二酰氯/CH2Cl2 和六亚甲基二胺水溶液中，以便在纤维表面附着和生长高分子量聚合物。通过傅里叶变换红外光谱、质子核磁共振、差示扫描量热法和热重分析对接枝尼龙进行了表征。结果表明，在接枝过程的第一阶段没有发生反咬，并且聚合物数量随着通过次数线性增加，等离子体处理的凯夫拉纤维最多可达~50次，玻璃纤维可达100次，此后聚合物数量在实验误差范围内保持恒定，这归因于终止反应的开始。聚合物。 COMPOS., 28:278–286, 2007。© 2007 塑料工程师学会
Nylon-6,6 was grafted at the surface of glass and plasma-treated Kevlar fibers for use in nylon–Kevlar thermoplastic composites. Hydroxyl and, in the case of Kevlar, amine end-groups occur at the fibre surface, either as defects or due to the plasma treatment. These were used as anchor points for nylon-6,6 step polycondensation. Fibers were subjected to successive dipping in adipoyl chloride/CH2Cl2 and aqueous hexamethylenediamine solutions in order to attach and grow high molecular weight polymer on the fiber surface. Grafted nylon was characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, differential scanning calorimetry and thermogravimetry. It was shown that no backbiting occurred during the first stage of the grafting process and that the polymer quantity increased linearly with number of passes, up to ∼50 passes for plasma-treated Kevlar and 100 for glass fibers, after which polymer quantity remained constant, within experimental error, which was attributed to the onset of termination reactions. POLYM. COMPOS., 28:278–286, 2007. © 2007 Society of Plastics Engineers