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Thermal degradation of 6‐chlorocellulose and cellulose–zinc chloride mixture

Thermal degradation of 6‐chlorocellulose and cellulose–zinc chloride mixture Introduction of chlorine as a substituent or addition of zinc chloride lowers the decomposition temperature of cellulose and suppresses the flaming combustion by reducing the rate of production and the total amount of combustible volatiles. Samples of 6‐chloro‐6‐deoxycellulose, with a low D.S., start to decompose with dehydrohalogenation. The resulting hydrogen chloride catalyzes the transglycosylation, dehydration, condensation and charring reactions as evidenced by production of large amounts of levoglucosenone, condensed tar, and char. A similar effect was produced by zinc chloride, except that it provided less levoglucosenone and more 3,6‐anhydroglucose derivatives. Also, a larger amount of the additive was required to reach the optimal effect. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Polymer Science Wiley

Thermal degradation of 6‐chlorocellulose and cellulose–zinc chloride mixture

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Publisher
Wiley
Copyright
Copyright © 1978 John Wiley & Sons, Inc.
ISSN
0021-8995
eISSN
1097-4628
DOI
10.1002/app.1978.070220503
Publisher site
See Article on Publisher Site

Abstract

Introduction of chlorine as a substituent or addition of zinc chloride lowers the decomposition temperature of cellulose and suppresses the flaming combustion by reducing the rate of production and the total amount of combustible volatiles. Samples of 6‐chloro‐6‐deoxycellulose, with a low D.S., start to decompose with dehydrohalogenation. The resulting hydrogen chloride catalyzes the transglycosylation, dehydration, condensation and charring reactions as evidenced by production of large amounts of levoglucosenone, condensed tar, and char. A similar effect was produced by zinc chloride, except that it provided less levoglucosenone and more 3,6‐anhydroglucose derivatives. Also, a larger amount of the additive was required to reach the optimal effect.

Journal

Journal of Applied Polymer Science – Wiley

Published: May 1, 1978

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