EPDM对PP结构发泡材料泡孔形态的影响  

Effect of EPDM on Cellular Morphology of PP Structural Foam

作　　者：杨胜强[1] 王旭[1] 许向彬[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《塑料工业》2009年第2期11-14,21,共5页China Plastics Industry

基　　金：国家自然科学基金项目(50573067)

摘　　要：利用毛细管流变仪、动态流变仪、差示扫描量热仪(DSC)和金相显微镜等研究了三元乙丙橡胶(EPDM)对聚丙烯(PP)熔体性能、PP相对结晶度和泡孔形态的影响。研究结果表明,当EPDM质量分数低于10%时,EPDM/PP共混物具有和PP相似的熔体黏度,但熔体强度和相对结晶度较低。当EPDM质量分数为9.5%时,制得了泡孔密度为2.3×105个/cm3、泡孔尺寸为90μm左右的结构发泡聚丙烯,EPDM显著提高了体系泡孔成核率。With capillary rheometer, dynamic rheometer, differential scanning calorimeter （DSC） andmetalloscope, the effect of ethylene propylene diene monomer （EPDM） on melt property of EPDM/PP blends, relative crystallinity of polypropylene （PP） and cell morphology were studied. The results showed that melt strength and relative crystallinity of PP/EPDM blend employed with low content EPDM （ ≤10 wt% ） were lower than the pure PP, meanwhile, the viscosity of the blend melt was rarely influenced by EPDM. When content of EPDM was 9.5 （wt）%, an cellular foam PP with cell density of 2.3 x 105cells/cm3 and cell size of about 90μm was prepared, owing to the promotion of cell nucleation on the interface of PP/EPDM and decreasing of crystallinity of PP/EPDM blend.

关 键 词：聚丙烯 熔体强度 相对结晶度 发泡 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]