| 摘要: | 論文旨在研究利用熔融混煉法製備熱塑性聚氨基甲酸酯/奈米二氧化矽(改質奈米二氧化矽)之複合材料，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。實驗使用3-甲基丙烯酸基丙基三甲氧基矽烷(MPS)接枝於奈米二氧化矽表面進行改質。用熱塑性聚氨基甲酸酯樹酯添加改質奈米二氧化矽與未改質奈米二氧化矽製備不同的成分克數(每一百克的熱塑性聚氨基甲酸酯所含該之成分克數)之奈米複合材料。
探討不同成分克數的SiO2和MPS-m-SiO2對熱塑性聚氨基甲酸酯奈米複合材料的形態學(粒徑分析、FT-IR、SEM、ESCA)、光學性質(透光度)、機械性質(硬度、抗張強度、耐磨耗指數及耐衝擊強度)、熱性質(TGA、VST、MI)及動態機械性質(DMA)之性能及影響的差異程度。
實驗結果得知，經由FT-IR、TGA以及XRD可以證實矽烷偶合劑接枝成功；在粒徑分析中改質前後之奈米二氧化矽皆在奈米等級；在SEM具有良好分散性能。添加奈米二氧化矽會提升熱塑性聚氨基甲酸酯/奈米二氧化矽複合材料之熱性質，耐熱性提升效果更顯著。在機械性質，添加奈米二氧化矽會使複合材料的抗張強度、耐衝擊強度、硬度提升，因此本次研究顯示添加奈米二氧化矽可以達到強化熱塑性聚氨基甲酸酯/奈米二氧化矽複合材料的效果。
This project object is to manufacture thermoplastic polyurethane (TPU)/nano-SiO2 organic/inorganic nanocomposites by melt intercalation process, and study the processing method, morphology and properties of nanocomposites. In this study, using 3- (Trimethoxysilyl) propyl methacrylate (MPS) grafted nano silicon surface modification. For thermoplastic polyurethane (TPU) Add prepared SiO2 and MPS-m- SiO2 nanocomposites with a different number of grams of composition (per 100 grams of resin contained in the composition of the number of grams). To use the relationship properties of nano-SiO2 included high strength, high modulus, thermal resistance, flame resistance, abrasion resistance, excellent hardness and high chemical stability to increase the static mechanical properties (tensile, hardness, abrasion), dynamic mechanical properties (storage modulus, loss modulus, tan ) and thermal properties (Vicat softening temperature, TGA, DSC) of TPU resin.
The experimental results that, by TGA, FT-IR, XRD and XPS testing can prove the success of silane coupling agent grafted via at particle size analysis, to retain the size of the reinforcing material in nano levels. thermoplastic polyurethane resin / silicon adding SiO2 and MPS-m- SiO2 part of the composite material, structure and morphology in SEM image that the addition of SiO2 and MPS-m- SiO2 allows more surface structures from the original hole into a smoother surface; a test of physical properties, effectively increasing; in mechanical properties test results, hardness and abrasion index, are all rising. The bending and tensile test, adding SiO2 or MPS-m- SiO2, its strength is rised; thermal properties, heat resistance improving effect is more significant; in terms of electrical properties, with SiO2 and MPS-m- SiO2 Add permittivity have to enhance the effect; transmittance affect optical properties, add more content SiO2 and MPS-m- SiO2, and will make it light transmission decreased, whereas the absorbance of a good promotion effect. |
