相容剂甲基丙烯酸缩水甘油酯对尼龙6/SEBS-g-MA/蒙脱土复合材料的性能影响及机理

以马来酸酐接枝SEBS(SEBS-g-MA)和有机蒙脱土(OMMT)分别作增韧剂和增强填料,甲基丙烯酸缩水甘油酯(GMA)为相容剂,采用熔融挤出方法制备了尼龙6/SEBS-g-MA/OMMT复合材料。通过扫描电镜(SEM)、力学性能测试、Molau实验及红外光谱(FT-IR)表征,考察了SEBS-g-MA、OMMT和GMA对复合材料的相形态和力学性能的影响。结果表明,OMMT能弱化PA6和SEBS-g-MA之间的相互作用力,导致橡胶相粒径增大,冲击强度降低。而GMA的使用,使PA6、SEBS-g-MA和GMA间形成化学反应,提高PA6和SEBS-g-MA之间的相容性,改善SEBS-g-MA的分散质量,减小分散相颗粒尺寸,进一步提高共混物的冲击强度。GMA存在时制备的复合材料可以获得具有良好平衡的综合力学性能。

Effect of Compatibizer Glycidul Methacrylate on the PA6/SEBS-g-MA/OMMT Nanocomposites

Polyamide 6(PA6)-based composites were prepared using a melt-mixing technique.One maleated styrene-ethylene/butadiene-styrene copolymers(SEBS-g-MA) and one commercial organic montmorillonite(OMMT) served as the toughener and reinforcing filler,respectively.Glycidyl methacrylate(GMA) was used as a compatibilizer.The influences of SEBS-g-MA,OMMT and GMA on interfacial adhesion and mechanical properties of PA6 composites were investigated in terms of scanning electron microscope(SEM) observations,mechanical testing,Molau tests,infrared spectrum(IR) analyses.The results show that OMMT can weaken the interfacial interactions between PA6 and SEBS-g-MA,resulting in the increase of rubber particle size.Besides,the use of GMA improves the compatibility between PA6 and SEBS-g-MA,leading to further reduction of the sizes of SEBS-g-MA in the matrix,and improves impact strength of the composites,this is due to the reactions between PA6,SEBS-g-MA,and GMA.Satisfactorily balanced mechanical properties of the composites could be achieved in the presence of GMA.