LLDPE/HDPE的反应挤出接枝及其热粘合性能  

Reactive Extrusion of LLDPE/HDPE Grafting MA and Its Hot-Melt Adhesion

作　　者：王宁[1] 王益龙[1] 邵淑芳[1] 卞太峰[1] 段海军[1] 

机构地区：[1]大连理工大学化工学院高分子材料系,辽宁大连116012

出　　处：《塑料》2008年第2期25-28,共4页Plastics

摘　　要：使用反应挤出机研究了线性低密度聚乙烯(LLDPE)和高密度聚乙烯(HDPE)混合物在反应挤出过程中接枝马来酸酐(MAH)的规律和接枝产物的性能。实验结果表明,在LLDPE中加入高于40%的HDPE,可使接枝产物的维卡软化点达到100℃以上的热熔胶产品要求;接枝产物的接枝率和熔体流动速率主要受过氧化二异丙苯(DCP)用量的控制;最佳的生产配方为:LLDPE/HDPE=60/40,MAH=1.5%,DCP=0.04%。经过红外光谱和示差扫描量热谱分析表明,反应挤出得到的接枝产物与国外同类产品的结构与组成相同,产品几乎无刺激性气味;随着接枝产物接枝率的提高,产物对钢板的剥离强度提高。钢板表面涂上环氧树脂后的热熔胶的剥离强度成倍增加。The reaction rules and properties of LLDPE/HDPE grafting maleic anhydride （MAH） in the presence of peroxide with reactive extruder were studied carefully. The experiment results showed that, by adding more than 40 percent of HDPE,graft product＇s vicat softening point could be above 100℃ ,which met the hot melt adhesive product＇ s requirements. The graft product grafting rate and melt flow rate （MFR） were mainly controlled by the content of the peroxide （DCP）. The best formula for the production：LLDPE / HDPE = 60/40, MAH = 1.5% , DCP = 0.04%. IR and DSC spectrum analysis showed this graft product had a similar structure and composition with a foreign hot melt adhesive product and had little irritating smell. The peel strength increased with the grafting rate. The peel strength multiplied when the steel＇ s surface was painted with epoxy resin.

关 键 词：反应挤出 接枝 线性低密度聚乙烯 高密度聚乙烯 热熔胶 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ316.343