直接熔融复合制备聚酰胺6／未改性蒙脱土纳米复合材料

在普通双螺杆挤出机上，基于未改性蒙脱土和聚酰胺6的直接熔融复合制备了纳米复合材料。通过插层剂的合理选择及不同插层剂的复配使用，可以得到具有插层刷离分散形态的聚酰胺6／未改性蒙脱土纳米复合材料。力学性能测试结果表明，有可能通过在聚酰胺6／未改性蒙脱土复合体系中插层剂的选择与调配实现同时增加聚酰胺6基体的强度和韧性的目的。在特定的插层剂复配条件下，复合材料的弯曲强度较基体增加20％，弯曲模量增加29％，同时干态冲击强度的增幅达70％以上。此外，还讨论了聚酰胺6／未改性蒙脱土复合体系的动态力学行为和流变性能。

Direct Melt Compounding for Polyamide 6/Pristine Montmorillonite Nanocomposites

An original direct melt extrusion processing of polyamide 6/clay nanocomposites is reported, based on pristine (Na~ -based)montmorillonite as well as a simple approach using typical twin-screw extruder.By the application of intercalation agents (small molecular or macromolecular) as thermody- namic assistance conditions,polyamide 6/pristine montmorillonite nanocomposites were prepared with the coexistence of intercalation and exfoliation state.The results of mechanical tests indicate that the strength and toughness of polyamide matrix could be simultaneously improved.For instance,with ap- propriate selection and joint usage of intercalation agents,the flexural strength could be improved by 20 %,and flexural modulus could be improved by 29 %,together with above 70 % improvement of impact strength compared to polyamide matrix.In addition,the dynamic mechanical properties and theologi- cal behavior of polyamide 6/pristine montmorillonite nanocomposites have been discussed in the print study.