PA6/HIPS/PP-g-(GMA-co-St)反应共混体系的研究

Reactive Blend Systems of PA6/HIPS/PP-g-(GMA-co-St)

通过扫描电镜、热分析、熔体流动速率、熔融扭矩和力学性能等测试方法研究了甲基丙烯酸缩水甘油酯 ( GMA)和苯乙烯 ( St)多单体熔融接枝聚丙烯 [PP-g-( GMA-co-St) ]对 PA6/HIPS共混物的熔融流变性能、结晶行为、相形态和力学性能的影响 .结果表明 ,在熔融共混过程中 ,PP-g-( GMA-co-St)中的环氧基与PA6的端氨基原位生成的接枝共聚物有效地降低了共混物的界面张力 ,提高了共混物的界面粘着力 ,使共聚物的流动速率降低 ,熔融扭矩提高 ;PA6分子链的规整性降低 ,结晶完善性变差 .在 PP-g-( GMA-co-St)的质量分数为 1 0 %时 ,共混物分散相的尺寸明显减少 ,力学性能得到较大提高 ;其中冲击强度超过纯 PA6,达到 HIPS水平 .通过反应共混 ,制备了力学性能均衡的 PA6/HIPS/PP-g-( GMA-co-St)

The glycidyl methacrylate(GMA) and styrene(St) multi-monomers melt grafted PP[PP-g-(GMA-co-St)], was used as a reactive compatibilizer of PA6/HIPS blends. The reactive blend system of PA6/HIPS/PP-g-(GMA-co-St) was studied by DSC, SEM and determinations of MFR, torque values and mechanical properties. The results showed that the crystallinity and melting temperature of PA6 were reduced and the interfacial tension and adhesion of the PA6/HIPS were improved in the presence of the PP-g-(GMA-co-St). The micrographs showed the better effect of compatibilization of the PP-g-(GMA-co-St) on the PA6/HIPS blends. When the content of the PP-g-(GMA-co-St) was 10%, the mechanical properties of the PA6/HIPS/PP-g-(GMA-co-St) were much improved; the impact strength of the blend surpassed the pure PA6 and reached the level of the pure HIPS. PA6/HIPS/ PP-g-(GMA-co-St) plastics alloy with the proportionate and good mechanical properties has been obtained by the reactive blend.