The Application of PLA in Fused Deposition Modeling

• Main Authors: Li-Ling Lin, 林麗玲
• Other Authors: Ph D.Yuan-Chien Tsai
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/83984957518823258875

碩士 === 萬能科技大學 === 材料科學與工程研究所在職專班 === 102 === In this study, we discuss about how to combine polylactic acid material with the manufacturing technique of hot melt molding deposition to produce experimental specimen models by using three materials- Hollow, Solid and Strong, and use thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and tensile strength to do some related experiments. The results of experiments show that in thermogravimetry analysis (TGA) heat resistance of PLA is worse than the one of ABS which means it would be limited to be applied in the environment of daily life. According to the differential scanning calorimetry (DSC) we can find that in cooling process PLA will increase the risk of nozzle clogging because of phase change. In dynamic mechanical analysis (DMA), while the heat temperature upper to 65℃, storage modulus of three kinds of PLA modes begin to produce differences. By the loss modulus and loss tangent, we can realize viscous behavior patterns in Hollow are more obvious. In tensile strength test, there is no big different in friability results. However, while comparing with three modes of ABS, due to the difference of elongation, the nature of toughness is quite different.