【摘要】 利用熔融接枝的方法对于马来酸酐 (MAH)接枝低密度聚乙烯 (LDPE)的反应规律进行了研究 ,并对接枝产物 (LDPE g MAH)在聚碳酸酯 /高密度聚乙烯 (PC/HDPE) ( 80 /2 0 )共混物的影响进行了研究。探讨了MAH用量在1.2 5～ 10份 ,DCP用量为 0 .12 5～ 1份范围内接枝产物中接枝率和凝胶的变化规律。接枝产物在PC/HDPE( 80 /2 0 )共混物应用结果表明 ,接枝率为 0 .8%的接枝产物对PC/HDPE( 80 /2 0 )共混物的增容作用优于 0 .3%的接枝产物。PC/HDPE( 80 /2 0 )共混物的断裂伸长率和冲击强度随着接枝产物的用量的增加而增大。而拉伸强度在接枝产物用量为 1.2份时出现极大值。扫描电子显微镜观察表明LDPE g MAH能够有效改善PC/HDPE( 80 /2 0 )共混物的相分散形态。更多还原

【Abstract】 Mechanism of maleic ahydirde (MAH) grafted to low density polyethylene (LDPE) by melting and the application of its product (LDPE-g-MAH) in polycarbonate/high density polyethylene (PC/HDPE) (80/20) blends were studied Effects of MAH content in a range of 1.25～10 phr and DCP content in a range of 0.125～1phr on graft ratio and gel content in the product were investigated. Study on the application of LDPE-g-MAH in the blends indicated that the LDPE-g-MAH with grafting ratio of 0.8% was more effective than the LDPE-g-MAH with grafting ratio of 0.3%. Elongation at break and impact strength of the blends increased while increasing the LDPE-g-MAH content. And tensile strength of the blends reached a maximum value when the LDPE-g-MAH content was 1.2 phr. Scanning electric microscope proved that LDPE-g-MAH could improve the morphology of the blend.更多还原