PA6/POE-g-MAH/PE–UHMW材料的制备及性能

以耐热改性组分尼龙6(PA6)为基体材料,超高分子量聚乙烯(PE-UHMW)为综合性能平衡组分,增韧剂马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)为相容剂,制得PA6/PE-UHMW/POE-g-MAH三元复合材料。研究结果表明,POE-g-MAH的加入可改善PA6的韧性,但降低了PA6的拉伸强度,随着POE-g-MAH加入量增加,PA6断裂伸长率逐渐增加,当添加量为30%时,断裂伸长率达到最大值397%,拉伸强度为39 MPa。PE-UHMW组分不仅提高了复合材料的拉伸强度和韧性,同时改善了其耐水解性能。当PA6∶POE-g-MAH∶PE-UHMW=70∶30∶10时,断裂伸长率提高至477%,拉伸强度为42 MPa。通过扫描电子显微镜分析观察复合材料的微观形态,发现在PA6基体中POE-g-MAH和PE-UHMW形成"核–壳"结构,对PA6韧性的提高起到了协同作用。

Preparation and Properties of PA6/POE-g-MAH/PE-UHMW Composites

Nylon6 (PA6)/ultra-high molecular weight polyethylene (PE-UHMW)/maleic anhydride grafted polyolyaltha olfin (POE-g-MAH) ternary composites were prepared by using PA6 as the matrix material,PE-UHMW as the comprehensive balance component and POE-g-MAH as the compatibilizer. The results show that the addition of POE-g-MAH could improve the toughness of PA6,but reduce the tensile strength of PA6. With the increase of POE-g-MAH content,the elongation at break of PA6 increase gradually,when the content of POE-g-MAH reach 30%,the elongation at break of PA6 reach a maximum of 397%,the tensile strength is 39 MPa. PE-UHMW component not only improve the toughness of the composites,but also improve the tensile strength and hydrolysis resistance of the composites. When PA6:POE-g-MAH:PE-UHMW =70:30:10,the elongation at break of PA6 increase to 477% and the tensile strength is 42 MPa. The microstructure of PA6 was observed by scanning electron microscope analysis. It was found that POE-g-MAH and PE-UHMW formed a core-shell structure in PA6 matrix,which had the synergistic effect on the improvement of PA6 toughness.