微孔聚乳酸材料的发泡性能进展  

Progress in Foaming Property of Microporous Polylactic Acid Material

作　　者：陈立鑫 李凤红[1] 师岩 姜天赐 王德喜 李鹏珍 CHEN Lixin;LI Fenghong;SHI Yan;JIANG Tianei;WANG Dexi;LI Pengzhen(School of Petrochemical Engineering,Shenyang Univ ersity of Technology,Liaoyang,Liaoning 111003,China;Boshi Fluid Equipment Co.,Ltd.,Liaoyang,Liaoning 111003,China)

机构地区：[1]沈阳工业大学,石油化工学院,辽宁辽阳111003 [2]博仕流体设备有限公司,辽宁辽阳111003

出　　处：《塑料》2020年第5期92-95,101,共5页Plastics

基　　金：大学生创新创业计划(201950,2019244)。

摘　　要：聚乳酸(PLA)微孔发泡材料具有良好的冲击强度、断裂韧性、低介电常数、低导热系数和热稳定性等特性,被广泛应用于日用品、应用包装、民用塑料和汽车内饰等行业中。但是,纯PLA微孔泡沫塑料由于具有脆性大、熔体强度低、价格高等缺陷,往往不能满足应用要求。文章详细地总结了国内外改善PLA微孔发泡性能方面的研究,主要.包括3个方面:提高PLA熔体强度、增强PLA韧性和探索适宜PLA的发泡工艺条件。阐述了熔体强度、韧性及发泡工艺对PLA发泡形态的影响,说明了改善前后PLA发泡形态的变化,详细叙述了PLA发泡性能的改善机理,介绍了PLA微孔发泡材料的力学性能和结晶性能。Polylactic acid( PLA) microcellular foaming materials have the advantages of better impact strength,fracture toughness,low dielectric constant,low thermal conductivity and thermal stability. It can be widely used in daily use industry,application packaging industry,civil plastic industry and automotive interior industry,etc. However,pure PLA microcellular foams with high brittleness,low melt strength and high price often fail to meet the application requirements. The research on improving the properties of PLA microcellular foaming was summarized in detail. It mainly included three aspects: improving the strength of PLA melt,enhancing PLA toughness and exploring the suitable foaming process conditions for PLA. The effects of melt strength,toughness and foaming process on the foaming morphology of PLA were described. The changes of foaming morphology of PLA before and after improvement were explained. The improvement mechanism of PLA foaming performance was described in detail. The mechanical and crystalline properties of PLA microcellular foaming materials were introduced.

关 键 词：聚乳酸 发泡形态 超临界流体 微孔泡沫塑料 发泡技术 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]