MAH熔融接枝LDPE及其产物在PC/HDPE共混物中的应用研究  

Study on MAH Grafted LDPE by Melting and Application of Its Product in PC/HDPE Blend

作　　者：李超勤[1] 张勇[1] 章长明[2] 李明[2] 黄风华[2] 

机构地区：[1]上海交通大学高分子材料研究所,上海200240 [2]上海氯碱化工股份有限公司技术中心,上海200241

出　　处：《中国塑料》2002年第8期31-34,共4页China Plastics

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。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.

关 键 词：MAH 熔融接枝 LDPE 接枝率 PC/HDPE共混物 马来酸酐 低密度聚乙烯 聚碳酸酯 

分 类 号：TQ325[化学工程—合成树脂塑料工业]