| 摘要: | 本論文旨在討論POM樹脂與奈米二氧化矽形成之奈米複合材料之加工製程、物理性質、機械性質與熱性質之研究。利用混煉法製備POM樹脂/奈米二氧化矽(改質前後)之奈米複合材料，混煉時以不同含量重量百分比之奈米二氧化矽進行混煉。探討成形後不同含量重量百分比的POM樹脂/奈米二氧化矽之形態學< FT-IR、XRD、粒徑分析、SEM、TEM、ESCA >，物理性質< 密度，空孔率，接觸角 >，機械性質< 硬度，抗折試驗，抗張試驗，衝擊強度試驗，耐磨耗指數 >，熱性質< TGA、MI、HDT、Vicat、DSC、TMA >，聚縮醛樹脂的性能和改善程度的差異。
實驗結果得知，經由FTIR分析，證實奈米二氧化矽已成功改質；在粒徑分析中改質前後之奈米二氧化矽顆粒皆符合奈米規範；在XRD和ESCA測試中可以看出POM含有奈米二氧化矽；在SEM和TEM中可以看出有良好的分散性；物理性質的測試中添加奈米二氧化矽粉末確實會有效提升；在機械性質測試裡，結果顯示抗張及抗折與硬度和耐衝擊皆有效提升，而耐磨耗指數在少量的添加下能略為下降磨耗量；在熱性質方面，隨著奈米二氧化矽添加量的增加，耐熱性效果提升更為顯著。
This paper aime to discuss the POM resin and nano silica composites formed by the processing process, physical properties, mechanical and thermal properties of. Prepared by mixing POM resin/nano silica (include non-modify and modify) nano composites with different content when mixing weight percent of nano silica by mixing.
After forming the different levels of weight percent of the POM resin/nano silica morphology (FT-IR, XRD, Particle, SEM, TEM, ESCA), physical properties ( Contact Angle, Density, Void content), mechanical properties (Hardness, Flexural test, Tensile test, Impact strength, Wearing), thermal properties (TGA, MI, HDT, Vicat, DSC, TMA) for POM resin properties and improve the degree of difference.
Experimental results show, by FT-IR, the crystal structure of POM / nano silica nanocomposites was determined; in particle size analysis show nano silica (include non-modify and modify) are both in nano specification; at XRD and ESCA test can see nanocomposites contains nano silica; Good dispersion can be seen in SEM and TEM. Adding nano silica powder does effectively enhance in the physical properties test; In the mechanical properties test results showed that the tensile and flexural, hardness and impact are effectively enhance, and wearing index decreased slightly wear volume in a small amount of add. In the thermal properties, heat resistance to enhance effect even more pronounced with the increase of nano silica add. |
