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用红外、扫描电镜、熔体流动速率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/PC共混物的反应增容作用 .研究结果表明 ,在熔融共混过程中 ,PP-g-( GMA-co-St)中的环氧基与 PA6的端氨基及 PC的端羟基原位生成的接枝共聚物有效地降低了共混物相间的界面张力 ,明显提高了共混物相界面的粘着力 .少量的 PP-g-( GMA-co-St)就能使 PA6和 PC的相容性得到显著改善 .当 PP-g-( GMA-co-St)的质量分数为 1 0 %时 ,共混物分散相的相区尺寸细化到 0 .2 μm,其力学性能也有较大提高 .PA6/PC/PP-g-( GMA-co-St)共混物的力学性能均衡 ,达到了弹性体增韧体系难以达到的效果 .即使 PP-g-( GMA-co-St)组分含量为 2 0 %时 ,共混物仍能保持较好的力学性能 ,特别是在共混物的韧性得以提高的同时 ,其强度和伸长率也提高
The effects of GMA and St multi-monomer melt grafted polypropylene [PP-g- (GMA- co-St)] to PA6 / PC blends.The results show that the epoxy groups in PP-g- (GMA-co-St) And the terminal hydroxyl groups of the PC formed in situ reduced the interfacial tension of the blends and markedly increased the adhesion of the blends at the interphase of the blends.The small amount of PP-g- (GMA-co-St) PA6 and PC can be significantly improved.When the mass fraction of PP-g- (GMA-co-St) is 10%, the phase size of the dispersed phase of the blend is refined to 0.2 μm, the mechanical properties of PA6 / PC / PP-g- (GMA-co-St) blends are also balanced.It is hard to achieve the toughening effect of elastomer.Though PP-g- (GMA-co-St) content of 20%, the blend can still maintain good mechanical properties, especially in the toughness of the blend can be improved at the same time, the strength and elongation also increased