聚甲亚胺/尼龙6原位聚合复合材料的力学性能

Mechanical Properties of Polyazomethine/Monomer Casting Nylon Composites through In-situ Polymerization

对原位聚合方法制备的聚甲亚胺/尼龙6复合材料的拉伸性能和冲击强度进行了研究.结果显示,随着聚甲亚胺加入量的增加,拉伸强度呈上升的趋势,至5％时达到极大值;而缺口冲击强度始终随聚甲亚胺含量的增加而增加,说明该类型聚甲亚胺对尼龙6基体起到了很好的增强和增韧作用.X衍射结果表明,尼龙6结晶度的变化规律正好与拉伸强度的变化相一致,说明了结晶度是力学性能改变的主要影响因素.透射电镜结果显示,聚甲亚胺在尼龙中呈良好的分散状态,冲击和拉伸断面形貌验证了上述力学性能的结果.

The mechanical properties of PAM/PA6 composites, polyazomethine (PAM), polycondensation product of terephthalaldehyde (TPA) with 1,6-hexanediamine (1,6-HAD), PA6, ε-caprolactam that was later polymerized, were studied. The results showed that the tensile strength increased with addition of PAM rigid chain, and reached the maximum in 5-wt% content of PAM, while the Charpy impact strength increased continuously. Therefore, PAM rigid chains play reinforced and toughened roles in the nylon 6 matrix. The results of WAXD experiments of the composites were consistent with those of tensile strengths. SEM imagines of fractured surfaces and TEM photo of PAM/PA6 (5-wt%) composite validated the mechanism of toughening.