Thermogravimetric analysis of cellulose: Effect of the molecular weight on thermal decomposition

Cellulose fractions of different molecular weights were subjected to dynamic thermogravimetric analysis in a nitrogen atmosphere. From the experimental data, activation energies and reaction orders were obtained following the Freeman–Carroll and Broido methods. The thermal stabilities of the samples...

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Bibliographic Details
Published in:Journal of applied polymer science 1989-06, Vol.37 (12), p.3305-3314
Main Authors: Calahorra, M. E., Cortázar, M., Eguiazábal, J. I., Guzmán, G. M.
Format: Article
Language:English
Subjects:
Applied sciences
Cellulose and derivatives
Exact sciences and technology
Natural polymers
Physicochemistry of polymers
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Summary:Cellulose fractions of different molecular weights were subjected to dynamic thermogravimetric analysis in a nitrogen atmosphere. From the experimental data, activation energies and reaction orders were obtained following the Freeman–Carroll and Broido methods. The thermal stabilities of the samples were estimated taking into account the values of Ti, Tmax, and Ea. The results show that thermal stability increases as the molecular weight increases. It was also found that the cellulose pyrolisis process cannot be described as having a single value of Ea over the entire pyrolisis range. The dependence of Ea. The dependence of Ea on molecular weight is also discussed.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.1989.070371203