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Apparent activation energy of degradation of poly[acrylonitrile‐ co ‐( N ‐vinylpyrrolidone)]
Author(s) -
Chen Hou,
Wang Chengguo,
Cai Huasu,
Cui Chuansheng
Publication year - 2004
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1197
Subject(s) - acrylonitrile , activation energy , n vinylpyrrolidone , copolymer , degradation (telecommunications) , solvent , polymer chemistry , differential scanning calorimetry , dimethylformamide , chemistry , materials science , chemical engineering , polymer , organic chemistry , thermodynamics , telecommunications , physics , computer science , engineering
Differential scanning calorimetry results of the degradation of poly[acrylonitrile‐ co ‐( N ‐vinylpyrrolidone)] in air are presented. The apparent activation energy of degradation was calculated using Kissinger's method. The effect of copolymerization conditions on the apparent activation energy was studied. Increasing the dimethylformamide concentration in the solvent mixture led to a rapid increase in the degradation apparent activation energy. The apparent activation energy decreased rapidly with increase in the comononer N ‐vinylpyrrolidone concentration, and this change becomes less prominent as the weight ratio of N ‐vinylpyrrolidone/acrylonitrile rises above 5/95. The apparent activation energy also increases with increasing copolymerization temperature. Copyright © 2004 Society of Chemical Industry