Maleic anhydride (MAH) and glycidyl methacrylate (GMA) dual monomer grafted POE (POE-g-MAH/GMA) toughened bio-based PA56 alloys were prepared by the physical co-blending modification method in a twin-screw extruder.The microscopic morphology, mechanical properties, flow properties, forming shrinkage properties and water absorption properties of the alloys were investigated.The results show that POE-g-MAH/GMA in each alloy is uniformly dispersed in the PA56 matrix in the form of regular spherical particles with a phase domain size of about 100-150 nm; When the mass fraction of POE-g-MAH/GMA is 25%, the notched impact strength of the alloy reaches 31 and 29 times that of pure PA56 at 23°C and -30°C, respectively, which indicates that POE-g-MAH/GMA has a very obvious improvement on toughness of PA56.With the increase of POE-g-MAH/GMA mass fraction, the water absorption of the alloy samples assumes a decreasing trend, but the tensile strength, bending strength and melt flow rate reduce slightly, and the forming shrinkage of the alloy slightly increases. Comprehensive analysis shows that the alloy material has high added value and is suitable for the preparation of products with high toughness requirements.

在双螺杆挤出机中采用物理共混改性方法制备马来酸酐（MAH）和甲基丙烯酸缩水甘油酯（GMA）双单体接枝POE（POE-g-MAH/GMA）增韧生物基PA56合金。显微形貌, 力学性能, 流动性能, 成型收缩性能和吸水性能的合金进行了研究。相域大小约为 100-150 纳米；当POE-g-MAH/GMA的质量分数为25%时，合金的缺口冲击强度在23℃和-30℃时分别达到纯PA56的31倍和29倍，表明POE-g -MAH/GMA对PA56的韧性有非常明显的改善。随着POE-g-MAH/GMA质量分数的增加，合金样品的吸水率呈下降趋势，但拉伸强度、弯曲强度和熔体流动性率略有降低，合金的成形收缩率略有增加。综合分析表明，该合金材料附加值高，适用于制备韧性要求高的产品。