GLASS TRANSITIONS AND ENTHALPY RELAXATION IN COALS

被引：21
作者：
MACKINNON, AJ
ANTXUSTEGI, MM
HALL, PJ
机构：
[1] Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL
来源：
FUEL | 1994年 / 73卷 / 01期
关键词：
MACROMOLECULAR STRUCTURE; COAL; DIFFERENTIAL SCANNING CALORIMETRY;
D O I：
10.1016/0016-2361(94)90196-1
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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 J g-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.
引用
收藏
页码：113 / 115
页数：3
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