填充型導電高分子其高分子本身並不導電，藉由加入導電的添加物填充於高分子中，以使其具導電性。本實驗利用硫酸與硝酸(3:1)的混合酸化學改質破壞奈米碳管表面及其長度並製備不同官能基的碳管粉末-羧酸基(-COOH)的碳管、以醯化(-COCl)處理碳管、十二烷基磺酸鈉（SDS）包覆的碳管；以高分子材料聚對苯二甲酸乙烯酯(PET)為母體摻雜於改質過後的多壁奈米碳管，利用球磨混合及熱壓成型的方法製備多壁奈米碳管－聚對苯二甲酸乙烯酯之奈米複合材料，並量測其導電性與導熱性。
研究後觀察高溫酸處理過後的多壁奈米碳管於有機溶劑中(ex.甲醇)分散性較佳，但摻雜塑化成膜後發現因長度過度切短而造成電阻值偏高，並比較純的PET(熱傳導係數值為0.194 W/m*K)與摻雜不同官能基粉
末的複合材料混合成膜時所測得的導熱係數，加入改質CNT的複合材料其導熱係數皆有提高的現象，經由酸處理50oC的CNT在2wt%的重量百分比可提高導熱性到51%，故其導熱現象在摻雜碳管後有較佳的情況。

Polymer materials which do not conduct electric current can become conductive by adding small amount of conductive nanomaterials. The current experiments demonstrate that by blending small amount of functionalized multiwall carbon nanotubes (MWNTs) with PET to form nanocomposite the PET-MWNTs can become conductive effectively both electrically and thermally. Three different methods of functionalization for the MWNTs are adopted. The first one uses solution of sulfuric acid mixed with nitric acid at a ratio of 3:1 to heat up and boil the MWNTs such that the surface of MWNTs is attached with carbonyl group. The second method uses the solution of SOCl2(20ml)+DMF(1ml) to heat and soak the MWNTs that was already acidic treated by the previous method such that the surface of MWNTs is attached with acryl chloride group. The third method is to soak the as grown MWNTs in SDS solution. The dispersion property of the functionalized MWNTs was tested in methanol by the light absorption of the mixed solvent at UV-vis spectrum. The acidic treated MWNTs by the first method have a much better dispersion. The functionalized MWNTs are then blending with the polyester powder in a planetary mill. The mixed powder was then hot
pressed to form a solid film in order for both the electric and thermal conductivity measurements. The results indicate that the resistivity of the PET blending with the as grown MWNTs has the lowest value while the resistivity of the PET blending with the acidic treated MWNTs with the first method has the highest value. However, the thermal conductivity of the PET blending with acidic treated MWNTs can increase up to 51% at 2wt% MWNT of the content and the result indicate that the thermal conductivity measurements of the PET blending with the as grown MWNTs are better. More discussion on these issues will be presented in the paper.

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