Physical property of 3D-printed sinusoidal pattern using shape memory TPU filament
Physical property of 3D-printed sinusoidal pattern using shape memory TPU filament
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DOI：
10.1177/0040517520919750
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发表时间：
2020-04-27
影响因子：
2.3
通讯作者：
Lee, Sunhee
中科院分区：
文献类型：
--
作者：
Kabir, Shahbaj;Kim, Hyelim;Lee, Sunhee
本研究研究了可 3D 打印形状记忆热塑性聚氨酯 (SMTPU) 长丝的物理特性及其通过熔融沉积建模 (FDM) 技术获得的 3D 打印正弦图案。为了研究 3D 长丝，通过红外光谱、X 射线衍射 (XRD)、动态机械热分析 (DMTA)、差示扫描量热法 (DSC) 和拉伸测试对热塑性聚氨酯 (TPU) 和 SMTPU 长丝进行了检查。然后，为了检查 3D 打印的正弦曲线样本，开发并 3D 打印了正弦曲线图案。这些样品经历了三步加热过程：（a）未处理状态； (b) 70℃加热5分钟，室温冷却30分钟； (c)重复步骤2。通过XRD、DMTA、DSC和拉伸测试检查3D打印正弦曲线样品的三种不同加热过程获得的结果，以获得加热或退火对结构和机械性能的影响。结果显示，由于加热步骤，SMTPU 3D 打印样品的结构、结晶度以及热性能和机械性能发生了显着变化。 XRD 显示结晶度随加热而增加。在 DMTA 中，储能模量、损耗模量和 tan sigma 峰位置也因不同的加热步骤而变化。 DSC结果显示，SMTPU 3D打印样品不同步骤的T-g在51℃左右几乎保持不变。随着加热过程的增加，TPU 3D打印正弦样品的拉伸性能在载荷和伸长率方面均下降，而对于SMTPU 3D打印正弦样品，载荷降低但伸长率增加约2.5倍。
This study has investigated the physical properties of 3D-printable shape memory thermoplastic polyurethane (SMTPU) filament and its 3D-printed sinusoidal pattern obtained by fused deposition modeling (FDM) technology. To investigate 3D filaments, thermoplastic polyurethane (TPU) and SMTPU filament were examined by conducting infrared spectroscopy, x-ray diffraction (XRD), dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC) and a tensile test. Then, to examine the 3D-printed sinusoidal samples, a sinusoidal pattern was developed and 3D-printed. Those samples went through a three-step heating process: (a) untreated state; (b) 5 min heating at 70 degrees C, cooling for 30 min at room temperature; and (c) a repeat of step 2. The results obtained by the three different heating processes of the 3D-printed sinusoidal samples were examined by XRD, DMTA, DSC and the tensile test to obtain the effect of heating or annealing on the structural and mechanical properties. The results show significant changes in structure, crystallinity and thermal and mechanical properties of SMTPU 3D-printed samples due to the heating steps. XRD showed the increase in crystallinity with heating. In DMTA, storage modulus, loss modulus and the tan sigma peak position also changed for various heating steps. The DSC result showed that the T-g for different steps of the SMTPU 3D-printed sample remained almost the same at around 51 degrees C. The tensile property of the TPU 3D-printed sinusoidal sample decreased in terms of both load and elongation with increased heating processes, while for the SMTPU 3D-printed sinusoidal sample, the load decreased but elongation increased about 2.5 times.