PLA/PEG共混材料的自增韧研究  

Study on Self-toughening of PLA/PEG Blend

作　　者：焦明立[1] 滕翠青[1] 韩克清[1] 余木火[1] 

机构地区：[1]东华大学材料学院东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《塑料工业》2008年第2期18-21,共4页China Plastics Industry

基　　金：国家自然科学基金50573010;20774018资助项目

摘　　要：采用压力诱导流动成型(PIF)对聚乳酸/聚乙二醇(PLA/PEG)共混物进行加工,研究了PIF对PLA/PEG共混材料的结构和性能影响。结果表明,PLA/PEG的球晶在压力作用下变形,形成无定形相和结晶相相互叠层的砖墙增韧结构,内部的分子链沿着流动方向排列;该砖墙结构使材料的拉伸性能提高了2.5倍,冲击性能提高了30倍;材料的Tg在压力诱导流动加工后升高。Polyglycol （PEG）/poly （ lactic acid） （PLA） blend was processed by means of pressure-induced flow moulding （PIF）. The effects of PIF on the structure and property of the blend were studied. The results showed the spherulite of the blend deformed in the pressure field, resulted in brick-wall toughened structure, and the inner molecular chains arranged along the flow direction; the brick-wall structure not only improved the tensile strength of the blend by 2.5 times, but also impact strength by 30 times. The T_g of the blend rose after the PIF.

关 键 词：聚乳酸 聚乙二醇 压力诱导流动成型 增韧 

分 类 号：TQ320[化学工程—合成树脂塑料工业]