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Glass transitions and enthalpy relaxation in coals

Mackinnon, A.J. and Antxustegi, M.M. and Hall, P.J. (1994) Glass transitions and enthalpy relaxation in coals. Fuel, 73 (1). pp. 113-115. ISSN 0016-2361

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Abstract

Differential scanning calorimetry was used to investigate the glass-to-rubber transition at 383 K of Illinois No. 6 coal dried at 383 K and thermally treated to 523 K. The intensity of the transition is 0.2 Jg−1 K−1, similar in magnitude to that for polypyrrole and polystyrene. The temperatures of the glass transitions in the coal and the polymers are also very similar. It is concluded that the glass transition of the coal represents a significant change in structure. Annealing experiments were conducted on the coal at temperatures just below the glass transition. Enthalpy relaxation occurred after thermal treatment to 553 K.

Item type: Article
ID code: 17693
Keywords: macromolecular structure, differential scanning calorimetry, coal, Chemical engineering
Subjects: Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 10 May 2010 13:00
    Last modified: 12 Mar 2012 11:08
    URI: http://strathprints.strath.ac.uk/id/eprint/17693

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