PLLA/PDLA共混材料的压力诱导流动成型研究  

Study on Pressure Induced Flow Molding of PLLA/PDLA Blends

作　　者：凡凡 骆佳美 马博谋[1] 胡斌斌 刘勇[1] 张辉[1] Fan Fan;Luo Jiamei;Ma Bomou;Hu Binbin;Liu Yong;Zhang Hui(College of Material Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院,上海201620

出　　处：《工程塑料应用》2020年第11期47-54,共8页Engineering Plastics Application

基　　金：国家重点研发计划(2017YFB0309300)。

摘　　要：在对左旋聚乳酸(PLLA)与右旋聚乳酸(PDLA)熔融共混材料的结构与性能研究的基础上,采用压力诱导流动成型(PIF)对PLLA/PDLA共混材料进行增韧改性,力学测试显示PIF之后PLLA/PDLA的拉伸强度由未加工时的23.05 MPa提高到34.03 MPa,断裂伸长率由3.4%提高至7.78%,冲击强度由未加工时的13.78 kJ/m^2提高至29.17 kJ/m^2。差示扫描量热和热重测试表明,PIF加工方式不会破坏PLLA/PDLA材料原有耐热性、对热分解温度影响较小。The same quality of poly(lactic acid)(PLLA)and Poly(D–lactic acid)(PDLA)were melt blended and injected into standard splines,and then toughened by pressure induced flow molding(PIF).The mechanical test show that the tensile strength increase from 23.05 MPa to 34.03 MPa,and the elongation at break increase from 3.4% to 7.78%.Moreover,the impact strength increase from 13.78 kJ/m^2 to 29.17 kJ/m^2,nearly 2.1 times.Differential scanning calorimeter and thermogravimetric analysis tests show that PIF approach did not damage the original heat resistance of PLLA/PDLA materials,while has little effect on thermal decomposition temperature.Therefore,PIF could be a certain guiding significance for the modification and application of PLA.

关 键 词：PLLA/PDLA 压力诱导流动成型 拉伸强度 冲击强度 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]