摘要
利用微层共挤出技术对聚丙烯(PP)/乙烯-乙烯醇共聚物(EVOH)共混物进行二次加工,制备出了气体阻隔性能显著提高的PP/EVOH共混复合材料。通过电子扫描显微镜、气体渗透实验研究了微层共挤出共混物的形态结构及其对共混物阻隔性能的影响。研究结果表明,微层共挤出技术能够有效调节EVOH分散相在PP基体中的形态结构,随着层数的增加,使其从零维球形变形为一维纤维状,进而演变成二维片状,这些形态导致128层微层共挤出共混物的气体阻隔性能较普通共混物提高了52倍。
The polypropylene （PP）/ethylene vinyl alcohol copolymer （EVOH） blends with outstanding gas resistance were prepared by microlayered coextrusion. The morphology structure of PP/EVOH microlayered blends and its effect on gas-barrier property were characterized by scanning electron microscopy and gas-permeability test. The results suggest that, it is an effective methods to regulate the morphology structure of dispersed phase EVOH in PP matrix using microlayered coextrusion, and with the increasing of layer number, The morphology of EVOH phase in PP matrix is changed from zero-dimension sphere to one-dimension fiber, then to two-dimension sheet, which causes significant improving of gas-barrier property of PP/EVOH microlayered blends compared with PP/EVOH conventional blends.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第8期105-108,共4页
Polymer Materials Science & Engineering
基金
国家重点基础发展规划项目(2005CB623800)
国家自然科学基金资助项目(50603016
50773047)
四川省应用基础研究项目(2008YJ0031)资助项目
