期刊
POLYMER DEGRADATION AND STABILITY
卷 78, 期 2, 页码 357-367出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0141-3910(02)00187-8
关键词
cellulose; thermal oxidation; chemiluminescence; polymerization degree changes
Kinetic analysis of chemiluminescence intensity-time and chemiluminescence intensity-temperature runs for oxidation of cellulose at elevated temperatures is presented showing a good coincidence of the first-order rate constants from non-isothermal chemiluminescence experiments with those obtained from polymerisation degree determinations and from the literature. Rate constants from isothermal runs are lower than those from non-isothermal runs, however, when repeating non-isothermal runs several times in so-called temperature cycling experiments, the non-isothermal rate constants approach isothermal ones. A method enabling the differentiation of faster and slower processes in oxidation of cellulose based on non-isothermal chemiluminescence runs is demonstrated. (C) 2002 Elsevier Science Ltd. All rights reserved.
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