压力场对微发泡PP复合材料发泡行为的影响  

Effect of Pressure Field on Micro-foaming Behavior of PP Composites

作　　者：段焕德 何力[2] 蒋团辉[2] 张纯[2] 龚维[2,3] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550003 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [3]贵州师范大学材料与建筑工程学院,贵州贵阳550014

出　　处：《塑料科技》2014年第9期44-47,共4页Plastics Science and Technology

基　　金：黔科合重大专项字(2012)6023号;贵阳市白云区科技计划项目

摘　　要：采用欠注成型工艺制备微发泡聚丙烯(PP)/纳米二氧化硅复合材料,通过建立物理模型分析外加压力场对PP复合材料发泡行为的影响规律。结果表明:随着外加压力的增大,PP复合材料的泡孔直径和密度都呈减小趋势;当外加压力为0.7 MPa时,泡孔直径为38.72μm,泡孔密度达到3.66×106个/cm3,分散度为17.85μm,材料发泡效果较理想。The microcellular PP/nano-SiO2 foamed composite was acquired through the owe injection foaming method. The influence of adding pressure field on the foamed behavior of PP composite material was analyzed by establish physical model. The results show that with the increasing of pressure, the bubble diameter and density of PP composite material decrease; when the pressure is 0.7 MPa, the best foaming result is obtained： the average cell diameter is 38.72 μm,cell density is 3.66×106 cells/cm3, and the degree of dispersion is 17.85 μm.

关 键 词：欠注成型 聚丙烯 发泡行为 压力场 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]