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Determination of the degradation apparent activation energy of acrylonitrile/acrylic acid copolymers
Author(s) -
Hou Chen,
Liu Junshen,
Ji Chunnuan,
Wang Chengguo
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22610
Subject(s) - acrylonitrile , copolymer , acrylic acid , activation energy , polymer chemistry , formamide , differential scanning calorimetry , materials science , solvent , polymerization , chemistry , polymer , organic chemistry , composite material , thermodynamics , physics
Acrylonitrile/acrylic acid copolymers were prepared by H 2 O/dimethyl formamide suspension polymerization technique. Differential scanning calorimetry was used to investigate the degradation of acrylonitrile/acrylic acid copolymers in air. The apparent activation energy of degradation of the copolymer was calculated with the Kissinger method. Effects of copolymerization conditions on the apparent activation energy of copolymer were studied. It has been found that increasing the dimethyl formamide concentration in the solvent mixture led to a gradual increase (97.3–149.4 kJ mol −1 ) in the apparent activation energy of degradation of the acrylonitrile/acrylic acid copolymers. The apparent activation energy decreases with increase in acrylic acid concentration, and this change became less prominent as the acrylic acid/acrylonitrile weight ratio is more than 5/95. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4668–4671, 2006