采用一系列不同甲基丙烯酸环氧丙酯（GMA）含量的苯乙烯-甲基丙烯酸环氧丙酯共聚物（SG）增容尼龙6（PA6）/间规聚苯乙烯（sPS）（80/20）共混物,通过扫描电镜及拉伸实验考察了SG共聚物中GMA的含量对共混物形态结构及力学性能的影响。形态观察显示,SG共聚物可以有效地降低PA6/sPS共混物中分散相的尺寸,增加两相界面间的粘接力;SG共聚物中GMA的含量对其增容效果有较大影响,质量分数为5%左右时,SG共聚物对PA6/sPS共混物的增容效果最佳。拉伸实验结果表明,PA6/sPS共混物的拉伸强度及模量随着SG共聚物的加入而增加,但其断裂伸长率在较高SG含量时则有所下降。
Blends of polyamide-6（PA6） with syndiotactic polystyrene（sPS） were prepared using a series of styrene/glycidyl methacrylate（SG） copolymers as compatibilizers.This study focuses on the effects of functionality and concentration of the compatibilizer on the morphology and mechanical properties of the blends via scanning electron microscopy and tensile test method.Morphology observation showed that SG copolymers are effective in reducing the sPS domain size and improving the interfacial adhesion.About 5% glycidyl methacrylate（GMA） is the optimum content in SG copolymer that produces the best compatibilization.Both the strength and modulus of the blend have been improved on addition of the SG copolymers,accompanying a loss in toughness when higher concentration copolymer is added.
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