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为了研究麦羟硅钠石对尼龙6(PA6)的改性作用,首先选择十六烷基三苯基溴化磷作为插层改性剂,用离子交换方法对麦羟硅钠石(Maga)进行有机化改性,制备了有机麦羟硅钠石(Org-Maga);然后利用熔融插层法制得了有机麦羟硅钠石/尼龙6复合材料(Org-Maga/PA6);采用XRD、SEM和TEM对材料的结构和微观形态进行了表征,用力学性能测试和DSC对其力学性能和结晶性能进行了研究。结果表明:插层剂十六烷基三苯基溴化磷可使麦羟硅钠石的层间距由1.53nm增大到2.90nm,有机麦羟硅钠石与PA6形成了插层与剥离并存的复合材料;有机麦羟硅钠石可明显提高PA6的力学性能,当有机麦羟硅钠石的质量分数为3wt%时,有机麦羟硅钠石/尼龙6复合材料的力学性能最佳;复合材料在熔融过程中出现了不稳定的γ晶型再结晶为α晶型的“熔融再结晶”现象;此外,麦羟硅钠石的加入还提高了PA6的结晶温度。
In order to study the modification effect of malvernoseite on nylon 6 (PA6), cetyltriphenylphosphonium bromide was chosen as intercalation modifier, (Org-Maga) was prepared by organic modification. Then, Org-Maga / PA6 was prepared by melt intercalation method. X-ray diffraction (XRD) and SEM And TEM were used to characterize the structure and microstructure of the materials. The mechanical properties and crystallinity of the materials were characterized by mechanical properties and DSC. The results show that intercalation of hexadecyltriphenylphosphonium bromide can increase the interlayer spacing of magadiite from 1.53nm to 2.90nm, and that the organic micasite and PA6 form intercalary and exfoliation The mechanical properties of the organic micasite / nylon 6 composites are best when the content of organic micasite is 3wt% In the melting process, the amorphous γ-type recrystallized into α-crystalline “melt-recrystallized” phenomenon. In addition, the addition of magadiite also increased the crystallization temperature of PA6.