马来酸酐含量及制备工艺对PA6/POE-g-MAH/Nano-CaCO3复合材料形态及力学性能的影响

通过改变共混物中乙烯辛烯共聚物（POE）与马来酸酐接枝POE（POE-g-MAH）的比例，研究了MAH含量对聚酰胺6（PA6）/POE/POE-g-MAH/纳米碳酸钙（nano-CaCO3）复合材料的微观结构和力学性能的影响。结果表明，MAH含量较高时，POE-g-MAH与PA6基体的相容性好，复合材料的冲击强度最高；制备工艺对复合材料的形态及力学性能有很大影响，采用两步法制备的复合材料中nano-CaCO3分散效果更好，其增容作用使弹性体分散相直径增大约100 nm，冲击强度较一步法提高21 %。

Influence of Maleic Anhydride Content and Processing Conditions on Morphology and Mechanical Properties of Polyamide 6/POE/POE-g-MAH/Nano-CaCO3 Composites

In this paper, the influence of MAH content on the morphology and mechanical properties of PA6/POE/POE-g-MAH/nano-CaCO3 composites was studied by changing the ratio of POE and POE-g-MAH. SEM images showed better compatibility between the PA6 matrix and POE elastomer when the MAH content was higher, resulting in the highest impact strength of the composites. Furthermore, it was found that the morphology and mechanical properties of the composites were greatly affected by the processing method. Nano-particles dispersed well in the matrix when the composites were prepared by a two-step processing method. The size of POE phase was enlarged about 100 nm by the formation of core- shell structure with nano-CaCO3 particles. As a result, the impact strength of the composites made by the two-step method increased 21 % compared with that of the composites by the one-step method.