| 摘要: | 本論文旨在討論聚苯乙烯(PS)與奈米二氧化矽(SiO2)形成之奈米複合材料之加工製程、物理性質及熱性質之研究。對奈米二氧化矽進行改質後，以固－液混合分散法製備聚苯乙烯 (PS)/奈米二氧化矽 (SiO2)之有機/無機奈米複合材料，混合時以不同含量之重量百分比的奈米二氧化矽 (SiO2)進行混合。探討成形後不同含量之重量百分比的聚苯乙烯 (PS)/奈米二氧化矽(SiO2)之有機/無機奈米複合材料物理性質、熱性質與改善聚苯乙烯(PS)性質程度差異
實驗結果得知，經由FTIR分析，證實奈米二氧化矽成功改質成功；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ESCA測試中可以看出奈米二氧化系改質上的訊號呈現；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，結果顯示硬度和耐衝擊皆有效提升，而耐磨耗指數隨著加入的奈米二氧化矽的提升而下降磨耗量；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 PS resin and nano silica composites formed by the processing process, physical properties, mechanical and thermal properties of. Prepared by mixing PS 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 PS resin/nano silica morphology (FT-IR, XRD, Particle, SEM, TEM, ESCA), physical properties ( Contact Angle, Density, Void content), mechanical properties (Hardness, Flexural test,,Impact strength, Wearing,), thermal properties (TGA, MI,, Vicat, DSC,) for PS resin properties and improve the degree of difference.Experimental results show, by FT-IR, the crystal structure of PS / nano silica nanocomposites was determined; in particle size analysis show nano silica (include non-modify and modify) are both in nano specification; at 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 t 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. |
