Thermogravimetry of the thermal degradation of Japanese lacquer (urushi) films |
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| Authors: | Seiji Takahashi Masamichi Tsukagoshi Toshiya Sato Yuki Kitahara Toshihiro Fujii |
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| Institution: | 1. Department of Chemistry, Faculty of Sciences and Engineering, Meisei University, Hodokubo 2-1-1, Hino, Tokyo, 191-8506, Japan
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| Abstract: | The kinetics of the thermal degradation of Japanese lacquer (urushi) films in N2 and in air were studied by means of thermogravimetry (TG). Thermogravimetric and derivative thermogravimetric curves indicated that the degradation occurred in three stages. The atmosphere influenced the apparent activation energies (E a) of the three degradation stages. The activation energies (E a) for the first stage in N2 and air, obtained from the TG curve, were 19.12 and 10.19 kcal mol?1, respectively, and the corresponding pre-exponential factors (A) were 6.18 × 105 and 1.24 × 102 min?1 for 1-year-old urushi films. |
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