相结构对PBE/EVA共混物CO2釜压发泡材料结构的影响  

Effect of Phase Structure on Foam Structure of PBE/EVA Composite under CO2 Batch Foaming

作　　者：李聂鑫 李明罡[2] 唐涛[2] 王轶[1] 邢海平[2] LI Niexin;LI Minggang;TANG Tao;WANG Yi;XING Haiping(Department of Chemistry,School of Science,Yanbian University,Yanji 133002,China;State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]延边大学理学院化学系,吉林延吉133002 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022

出　　处：《中国塑料》2020年第9期1-8,共8页China Plastics

基　　金：国家自然科学基金(51573179、51991353);吉林省科技计划(20170203006GX)。

摘　　要：以熔融共混的方法制备了具有不同相结构的丙烯基弹性体/乙烯⁃醋酸乙烯共聚物(PBE/EVA)共混物,并进行了CO2釜压发泡。通过差示扫描量热法(DSC)、动态热力学分析(DMA)、扫描电子显微镜(SEM)等方法研究了PBE/EVA共混物相结构对其发泡后材料泡孔结构的影响。结果表明,当共混物相结构为海岛相结构时得到常规的蜂窝状泡沫;而当相结构为双连续相结构时,获得了一种网状的开孔结构,这主要归因于两相组分黏度的差异。In this paper,the propylene⁃based elastomer/ethylene⁃vinyl acetate copolymer(PBE/EVA)blends with differ⁃ent phase structures are prepared by melt blending and then foamed under CO2 batch foaming.The effect of PBE/EVA phase structure on the foam cell structure was investigated by differential scanning calorimetry,dynamic mechanical anal⁃ysis and scanning electron microscopy.When the phase structure of blends presented the“see⁃island”phase,a conven⁃tional honeycomb⁃foamed structure was obtained.An open⁃cell network structures was achieved when the blends pos⁃sessed a bicontinuous phase structure.The formation of such a special cell structure is ascribed to the difference in viscosi⁃ty between the two components in the bicontinuous phase structure.This study helps to strengthen the understanding of the relationship between polymer phase structure and foaming behavior and therefore provides an important reference for preparation of polymer foams with specific open cells.

关 键 词：丙烯基弹性体 乙烯⁃醋酸乙烯共聚物 共混 双连续相结构 开孔泡沫 

分 类 号：TQ328.06[化学工程—合成树脂塑料工业]