无机粉体对LDPE复合材料发泡行为及力学性能的影响  

Effect of Inorganic Powder on Foaming Behavior and Mechanical Properties of LDPE Composites

作　　者：刘何琳[1,2] 张纯[3] 刘卫[1,2] 龚维[1,2,3] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550014 [2]贵州省无机非金属功能材料重点实验室,贵州贵阳550014 [3]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《现代塑料加工应用》2014年第4期32-34,共3页Modern Plastics Processing and Applications

基　　金：国家自然基金项目(21264004);贵州省省长基金项目;(黔科合专字(2012)76号);贵阳市工业振兴计划项目;(筑科合同[2012101]3-9号);大学生创新项目(201310663006)

摘　　要：以低密度聚乙烯(LDPE)为基体,添加改性的无机粉体后,在化学发泡和二次开模注射成型下制备发泡LDPE复合材料,分析了无机粉体对发泡LDPE复合材料发泡行为及力学性能的变化规律。结果表明:添加无机粉体后,发泡LDPE复合材料的发泡质量明显变化,力学性能有所提高。以添加纳米蒙脱土的LDPE复合材料发泡效果最好,泡孔直径和泡孔密度分别为45.8μm,8.05×106个/cm3;压缩强度达到20.68 MPa。By taking low density polyethylene （I.DPE） as basic materials, and adding inorganic power into I.DPE, then the foamed LDPE eomposites was made by the chemical foaming and twice-open mold. The effect rule of inorganic powder on foaming behavior and mechanical properties of foamed LDPE composites was analyzed. The results show that after inorganic powder is added, the foaming quality of the foamed LDPE composites is significantly changed, and mechanical properties are improved. Foamed LDPE composites with nano montrnorillonite have better foaming effect. Cell diameter and cell density are respectively 45. 8μm, 8. 05×10^6 cells/cm3, and compressive strength is 20.68 MPa.

关 键 词：低密度聚乙烯 无机粉体 纳米二氧化硅 纳米蒙脱土 发泡行为 力学性能 

分 类 号：TQ328[化学工程—合成树脂塑料工业]