| 摘要: | 本論文研究首先利用熱塑性聚胺基甲酸酯（thermoplastic polyure-thane ，TPU）和奈米二氧化鈦（nano TiO2）與改質奈米二氧化鈦（nano MPS-m-TiO2）經熔融混練機均勻混合形成奈米複合材料，再探討此奈米複合材料之加工製程、光學性質、物理性質、機械性質、熱性質及動態機械性質。實驗中奈米二氧化鈦使用3-甲基丙烯酸基丙基三甲氧基矽烷(MPS)進行改質，使其接枝於奈米二氧化鈦表面，藉由FT-IR、TGA、XRD驗證是否改質成功。
實驗中所使用的高分子複合材料由熱塑性聚胺基甲酸酯樹酯依比例添加未改質奈米二氧化鈦和改質奈米二氧化鈦1、3、5 phr放入熔融混煉機混煉(每100 g的TPU：1g、3g、5g 的TiO2、m-TiO2)之奈米複合材料。
探討添加不同克數的TiO2和MPS-m-TiO2對熱塑性聚胺基甲酸酯之奈米複合材料的光譜分析（拉曼、FT-IR、XRD）、光學性質（透光度）、機械性質（抗張、耐衝擊、耐磨耗、硬度）、熱性質（TGA、VST、MI）和熱動態性質（DMA）。
實驗結果得知，透過傅立葉紅外線光譜儀（FT-IR）、熱重分析儀（TGA）得以證實矽烷偶合劑（MPS）接枝成功；粒徑分析證實改質前後的奈米二氧化鈦皆在奈米等級；掃描式電子顯微鏡（SEM）觀察出具有良好分散性能。添加奈米二氧化鈦會提升此奈米複合材料之熱性質，耐熱性也提升更加顯著。在機械性質方面，抗張強度、耐衝擊強度、硬度也因奈米二氧化鈦的添加而提升。因此本次研究顯示添加奈米二氧化鈦可以達到強化熱塑性聚胺基甲酸酯/奈米二氧化鈦複合材料的效果。
This project object is use the thermoplastic polyurethane (TPU) and nano titanium dioxide (TiO2) to uniformly mix the nanocomposites were uniformly mixed by a melt kneading machine, and the processing, optical properties, physical properties, mechanical properties, thermal properties and dynamic mechanical properties of the nanocomposites were investigated. Surface modified modifier is used 3-(Trimethoxysilyl) propyl methacrylate (MPS). It was grafted onto the surface of nano titanium dioxide, and it was verified by FT-IR, TGA, XRD whether the modification was successful.
The polymer composite used in the experiment was prepared by adding unmodified nano titanium dioxide and modified nano titanium dioxide in proportion to thermoplastic polyurethane resin. 1, 3, 5 phr of a nanocom-posite compounded in a melt kneader (TPU per 100 g: 1 g, 3 g, 5 g of TiO2, m-TiO2).
Study on the spectral analysis (Raman, FT-IR, XRD),optical properties (transparency),mechanical properties (tensile, impact, wear resistance, hardness) thermal properties (TGA, VST, MI) and thermal dynamic proper-ties (DMA).of TiO2 and MPS-m-TiO2 on different thermoplastic composites with different grams. Particle size analysis confirmed that the nano TiO2 be-fore and after the modification was in the nanometer grade. SEM showed good dispersion properties. The addition of nano TiO2 will enhance the thermal properties of this nanocomposite, and the heat resistance is also improved. In terms of mechanical properties, tensile strength, impact strength and hardness are also enhanced by the addition of nano TiO2.
Therefore, this study shows that the addition of nano TiO2 can achieve the effect of strengthening thermoplastic polyurethane/nano titanium dioxide composite. |
