聚乳酸3D打印件材料性能表征  

Property Characterization of Polylactic Acid Product Formed by 3D Printing

作　　者：于晓东[1,2] 陈涛[1,2] 贾茹[1] 

机构地区：[1]西南科技大学分析测试中心,四川绵阳621010 [2]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《现代塑料加工应用》2016年第2期51-53,共3页Modern Plastics Processing and Applications

基　　金：西南科技大学博士基金(11zx7136)

摘　　要：分别通过3D打印快速熔融沉积成型和传统注射成型加工方法,对聚乳酸(PLA)材料成型加工,通过傅里叶变换红外光谱(FTIR)、差示扫描量热分析(DSC)、拉伸性能测试及扫描电子显微镜(SEM)分析对2种试件材料的结构和性能进行研究。结果表明:3D打印PLA材料的玻璃化转变温度为59.79℃,结晶度为9.83%,拉伸强度为34.2 MPa,均低于注射成型材料的;但其断裂伸长率为8.19%,高于注射成型材料的。除结晶度影响3D打印PLA材料的力学性能以外,扫描电镜结果显示3D打印成型材料的取向性结构也是削弱其力学性能的主要原因之一。3D printing of rapid fused deposition modeling and the injection molding were used to form polylactic acid (PLA) specimens, which were used for studying the structure and property of PLA by performing FTIR,DSC,tensile test and SEM analysis. The results show that the glass-transition temperature,crystallinity and tensile strength of the PLA material formed by 3D printing are 59.79 ℃,9.83% and 34.2 MPa,respec-tively,which are lower than the one molded by inj ection molding,and the elongation of the PLA material formed by 3D printing is 8.19%,which is higher than the one molded by inj ection molding.Besides of the lower crystallinity, the SEM result shows that the structure orientation is another main reason,which weakens the mechanical properties of the PLA specimen formed by 3D printing.

关 键 词：聚乳酸 3D打印 熔融沉积成型 注射成型 性能 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]