聚乳酸/反式-1,4-聚异戊二烯材料超临界CO_2发泡性能的研究  

Study of Poly(Lactic Acid)/Trans-1,4-polyisoprene Blends Foaming Behaviors Blowing with Supercritical CO_2

作　　者：康菲菲[1] 高长云[1] 孟倩倩[1] 辛振祥[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2018年第1期47-53,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51273098);山东省自然科学基金项目(ZR2011EMQ013)

摘　　要：采用熔融共混方法制备了聚乳酸(PLA)/反式-1,4-聚异戊二烯(TPI)和交联PLA/TPI共混体系,并采用超临界CO_2发泡方法对其进行发泡。通过拉伸测试、差示扫描量热分析(DSC)、扫描电子显微镜(SEM)等测试手段对比了PLA/TPI配比、交联剂的加入等因素对材料性能的影响。研究表明,TPI的加入提高了PLA的韧性,但对结晶和熔融影响不大。PLA/TPI和交联PLA/TPI均可形成闭孔泡沫材料,且交联体系的发泡倍率和发泡尺寸均大于非交联体系。随着TPI含量的增加,材料的泡孔尺寸变小,泡孔壁变厚,发泡倍率降低。The blends of poly（lactic acid）（PLA/trans 1,4 poly-isoprene（TPI）and crosslinked poly（lactic acid）（PLA）/trans 1,4 poly-isoprene（TPI）were prepared via melt-blending method.PLA/TPI and cross-linked PLA/TPI foams were prepared by the method of the supercritical carbon dioxide foaming technology.The influence of blend composition,function of crosslinking agent were studied with the tensile testing,differential Scanning Calorimetry（DSC）and the scanning electron microscopy（SEM）.The results showed that the addition of TPI improved the toughness of PLA and had little effect on melting and crystallization of PLA.Both PLA/TPI and crosslinked PLA/TPI system formed close-celled porous structure.And foaming ratio and cell size of crosslinking system were greater than non-crosslinking system.The cell sizes,cell wall and foaming ratio were reduced with the increase of TPI.

关 键 词：聚乳酸 反式-1 4-聚异戊二烯 超临界CO2发泡 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]