散熱複合材料熱性質與機械性質之研究

A Study on the Thermal and Mechanical Properties of Epoxy/AlN and Epoxy/Al2O3 Composite Materials with Thermal Diffusivity Function

王泰傑(Tai-Chieh Wang)

指導教授 ： 鄧道興 ； 鄭國彬

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2008年)

摘要

本研究係以氮化鋁及氧化鋁做為無機添充粉體加入雙酚A型環氧樹脂(Diglycidyl Ether of Bisphenol A)中，並改變不同之添加量(10, 30 ,50 ,70wt%)，觀測其固化成型後之機械性質與熱性質之改善程度，在機械性質上對其作拉伸性質測試，而在熱性質方面，以示差掃瞄熱卡分析儀（DSC）分析粉體含量對複合材料之影響與玻璃轉移溫度（Tg）之變化；以熱重分析儀（TGA）來分析複合材料之耐熱性；並針對其導熱性質作熱傳導性測試，而在複材之結構變化分析中；利用傅立葉紅外光譜儀(FT-IR)鑑定材料反應前後之官能基變化圖，以X-ray繞射分析儀（XRD）來鑑定複合材料之結晶型態；並利用掃描式電子顯微鏡(SEM)來觀測複合材料無機粉體在基材中之分散情形。
實驗結果顯示:經添加氧化鋁及氮化鋁之散熱複合材料，在FT-IR圖形中，並無明顯官能基之改變，為一物理性之摻混，由XRD測試可得知，當無機粉體添加量比例變高時，環氧樹脂之不定型區逐漸減弱；隨著無機粉體添加量之增多，密度與比重會上升，而孔隙率亦會上升，在熱性質方面，由TGA測試得知添加無機粉體後，會提高其熱分解溫度，增加其熱穩定性，而在DSC測試上，則得知當無機粉體添加量逐漸增高時，其Tg點會呈現先上升後下降之情況，而熱傳導測試與溫差測試則有導熱性逐漸提高之情形，而在機械性質方面，加入無機粉體，會使複合材料拉伸強度下降，而由SEM觀測中，則可得知在10, 30 wt%時有較佳之分散性，而在50, 70 wt% 時則會有團聚現象產生。

關鍵字

環氧樹脂 ； 雙酚A型環氧樹脂 ； 氧化鋁 ； 氮化鋁 ； 複合材料

並列摘要

In this study, the AlN and Aluminum oxide inorganic powders in weight percentages of 10, 30, 50 and 70 were added into Diglycidyl Ether of Bisphenol A (DGEBA) as fillers and the mechanical properties and thermal properties of such composites were studied. The tensile properties, flexural properties and impact strength were investigated. The DSC was applied to analyze the effect of powder amount on glass transition temperature（Tg）. In addition, the thermal stability was analyzed by TGA. Furthermore, the thermal conductive properties of composites were analyzed. For structure analysis, the FT-IR was used to probe the change of function group while the crystalline behaviors were determined by XRD. The dispersion of powders in composites were analyzed through the observation of fracture surface by SEM.
From the data of FT-IR test, it showed that no new groups were made nor phenomenon of displacement was happened by adding the Aluminum Nitride or Aluminum Oxide. The XRD results indicated that by adding inorganic fillers into epoxy composites, the amorphous area declined slowly as the amounts of inorganic filler increased. Besides, it was found that the bulk density, apparent density and the porosity increased with increasing powders and on the contrary was the moisture content. For thermal properties, it was obviously that the inorganic fillers would raise the thermal decomposition temperature that would enhance its thermal stability. The DSC results showed that as the inorganic powders were added, the Tg would increase but it would decrease while the adding powders were over certain amount. And the results of thermal conductive test and temperature different test showed that the Thermal Conductivities and temperature different rate increased by the increasing amount of filler. The experimental results showed that the mechanical properties declined with the increase of inorganic powder concentration. The observation of fracture surface by SEM. revealed that while fillers at the range in between 10-30 wt%, better dispersibility was found and at 50wt% and 70wt% the aggregation phenomenon would appear.

並列關鍵字

Epoxy ； DGEBA ； Aluminum Nitride ； Aluminum Oxide ； Composites

參考文獻

2. H. Miyagawa and M. J. Rich, “Amine-Cured Epoxy/Clay Nanocomposites”, Journal of Polymer Science, Vol. 42, 2004, pp. 4384–4390.

3. M. Hussain, R. J. Varley, “Effect of Organo-Phosphorus and Nano-Clay Materials on the Thermal and Fire Performance of Epoxy Resins,” Journal of Applied Polymer Science, Vol. 91, 2004, pp. 1233–1253.

4. Y. KE, J. LU , X. YI, “The Effects of Promoter and Curing Process on Exfoliation Behavior of Epoxy/Clay Nanocomposites,” Journal of Applied Polymer Science, Vol. 78, 2000, pp. 808–815.

7. K. C. Yung, B. L. Zhu, J. Wu, T. M. Yue,” Effect of AlN Content on the Performance of Brominated Epoxy Resin for Printed Circuit Board Substrate,” Journal of Polymer Science, Vol. 45, 2007, pp. 1662–1674.

8. 劉世良，提升氮化鋁/環氧樹脂複合材料熱傳導性質之研究，碩士，國立成功大學化學工程研究所，台南，2003。