环氧树脂对PA6/EPDM-g-MAH共混体系性能的影响

将两种不同型号的环氧树脂（EP(903)、EP(619D)）分别与PA6/EPDM-MA体系进行共混，制备了PA6/EPDM-MA/EP三元共混物。通过力学测试、动态流变(DMA)、差示扫描量热法（DSC）研究了不同EP添加量和环氧当量对PA6/EPDM-MA/EP共混体系性能的影响。实验结果表明：添加EP可以提高PA6/EPDM-MA共混物的拉伸强度，缺口冲击强度，并随着EP含量的增加而增加；而PA6/EPDM-MA/EP三元共混体系的动态储能模量（G′），复合黏度（η*）随着EP含量的增加而增大，损耗因子（tanδ）减小；结晶度比未加环氧的共混物的结晶度稍高，并且随着环氧含量增加先增加后降低。此外，添加EP(903)的共混物各种性能变化比EP(619D)快。

Effects of Epoxy Resin on Properties of Polyamide 6/EPDM-MA Composites

In order to improve the tensile strength of Polyamide 6 (PA6)/EPDM-MA blend, the PA6/EPDM-MA/Epoxy (EP) ternary composites were prepared. Two different types of epoxy resin with various epoxy equivalent were used. The effects of different epoxy on the mechanical properties, rheological behavior, crystallization behavior of the ternary composites were studied by mechanical testing, dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). It was found that the tensile strength and Notched izod impact strength of PA6/EPDM-MA blend was enhanced with the content of EP. The result from DMA showed that storage modulus(G’) and complex viscosity (η*) increased with content of EP while dynamic loss tangent (tanδ) decreased. Moreover, the crystallinity first increased and then decreased when the EP content increasing. All above properties of the composites were more sensitive to the epoxy resin with low epoxy equivalent.