Determination of thermal lifetime and IR spectra of conducting polyaniline at various temperatures
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摘要: 導電高分子聚苯胺的應用依賴于環境的溫度.為了測定溫度對聚苯胺的影響,首先采用循環伏安法在硫酸介質中電化學合成了導電高分子聚苯胺,然后利用TGA熱分析測定了聚苯胺的熱分解溫度為285.2℃.通過等溫熱重法計算了材料的熱壽命,得到失重5%,7%, 10%時的熱壽命方程.聚苯胺變溫紅外的測定結果表明,隨著溫度的升高,聚苯胺特征吸收波數,由于分子鍵共軛程度的降低,均向高波數位移.Abstract: Conducting polyaniline depended on environmental temperature. In order to determine the effect of temperature on polyaniline, polyanuline was electrosynthetized by the cyclic voltmmetric method in sulfuric acid. The thermal decomposition temperature ofpolyaniline was determined to be 285.7℃ by TAG. The thermal lifetimes were tested by the isothermal TG for regression of the lifetime equations at various weight-loss ratios of 5%, 7% and 10%. IR spectra showed that the characteristic absorption shifted to a higher number with increasing temperature, which was caused by the decreasing conjugate structure of polyaniline.
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Key words:
- polyaniline /
- TG /
- thermal lifetime /
- IR spectra
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