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標題: 熱塑性聚胺基甲酸酯/蒙脫土奈米複合材料之製備與物性
Preparation and physical properties of thermoplastic polyurethane /montmorillonite nanocomposites
作者: 彭俊彥
關鍵字: MMT;蒙脫土;nanocomposite;kneading process;Thermolplastic Polyurethane;Polyurethane Dispersion;奈米複材;捏合製程;熱塑性聚胺基甲酸酯;水性聚胺基甲酸酯
出版社: 化學工程學系
The MMT-master batch is introduced in proportion to the matrix of Thermolplastic Polyurethane (TPU) by kneading process to prepare nanocomposites in this study. This master batch is prepared by the negatively charged MMT adsorbed with cationic polyelectrolytes in the water phase and then “coagulated” with negatively charged Polyurethane Dispersion (PUD).
Characterized by FTIR and DSC, the compatibility of PUD with TPU matrix of the master batch is confirmed. The result of XRD demonstrated that the d-spacing of MMT is greater than 4.4 nm. The storage modulus, as compared with TPU, increased 59% at -100℃ and 43% at 25℃, respectively at 5 wt% MMT loading. The tensile strength and elongation at break of TPU nanocomposite at 3 wt % MMT also increases 38% and 23%, respectively.
In this research, we demonstrated the preparation of TPU/MMT nanocomposite by kneading process with improved mechanical and thermal properties as compared with those of TPU.

摘 要
本研究利用捏合製程,將製備所得之蒙脫土-濃縮體添加於熱塑性聚胺基甲酸酯(Thermalplastic Polyurethane, TPU)基材中。濃縮體的製備方式,乃於水相中進行負電性之蒙脫土與陽離子型聚電解質的吸附,再與外圍呈陰電性之聚胺基甲酸酯分散液(Polyurethane Dispersion, PUD)進行共凝聚後得之。
經製備之 TPU/蒙脫土奈米複材,由 FT-IR與 DSC的結果發現,此乃完全相容型之混摻系統。XRD結果顯示,蒙脫土層間距皆已大於 4.4 nm。添加 5 wt %蒙脫土於 -100 ℃及25 ℃下之儲存模數 (E’)分別比 TPU提高 59%及 43%。添加 3 wt %蒙脫土之拉伸強度與伸長率亦分別比 TPU提高 38%及 23%。
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