文献类型：期刊文献

英文题名：Thermogravimetric analysis of chitosan

作者：Hong, Peng-Zhi[1]; Li, Si-Dong[1]; Ou, Chun-Yan[1]; Li, Cheng-Peng[1]; Yang, Lei[1]; Zhang, Chao-Hua[1];洪鹏志[2];

机构：Guangdong Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524088, Peoples R China; Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China

年份：2007

卷号：105

期号：2

起止页码：547

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000246709500035)、、EI(收录号：20072410654927)、Scopus(收录号：2-s2.0-34250186442)、WOS

语种：英文

外文关键词：chitosan; thermal degradation; reaction kinetic; thermogravimetric analysis

外文摘要：The thermal degradation of chitosan at different heating rates B in nitrogen was studied by thermogravimetric analysis. The results indicate that the thermal degradation of chitosan in nitrogen is a one-step reaction. The degradation temperatures increase with B. Experimentally, the initial degradation temperature (T-0) is (1.049B + 326.8)degrees C; the temperature at the maximum degradation rate, that is, the peak temperature on a differential thermogravimetry curve (T-p,), is (1.291B + 355.2)degrees C; and the final degradation temperature (T-f) is (1.505B + 369.7)degrees C. The degradation rates at T. and Tf are not affected by B, and their average values are 50.17% and 72.16%, respectively, the maximum thermal degradation reaction rate, that is, the peak height on a differential thermogravimetry curve (R-p), increases with B. The relationship between B and R-p is R-p = (1.20B + 2.44)% min(-1). The thermal degradation kinetic parameters are calculated with the Ozawa-Flynn-Wall method. The reaction activation energy (E) and frequency factor (A) change with an increasing degree of decomposition, and the variable trends of the two kinetic parameters are similar. The values of F and A increase remarkably during the initial stage of the reaction, then keep relatively steady, and finally reach a peak during the last stage. The velocity constants of the thermal degradation vary with the degree of decomposition and increase with the reaction temperature. (c) 2007 Wiley Periodicals, Inc.