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Comparative study of the physical aging of the epoxy systems BADGE n = 0/ m ‐XDA and BADGE n = 0/ m ‐XDA/PEI
Author(s) -
Fraga F.,
Payo P.,
RodríguezNúñez E.,
MartínezAgeitos J. M.,
CastroDíaz C.
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.24303
Subject(s) - polyetherimide , differential scanning calorimetry , epoxy , glass transition , enthalpy , diglycidyl ether , thermoplastic , materials science , enthalpy of fusion , composite material , bisphenol a , polymer chemistry , chemistry , thermodynamics , analytical chemistry (journal) , polymer , organic chemistry , physics
The physical aging of the epoxy network consisting of a diglycidyl ether of bisphenol A, m ‐xylylenediamine, and polyetherimide was studied by differential scanning calorimetry. The glass transition temperature and the variation of the specific heat capacities have been calculated using the method, based on the intersection of both enthalpy–temperature lines for glassy and liquid states. The apparent activation energy ( E H ) was calculated using a single method that involved separate temperature and excess enthalpy dependency. All calorimetric data were compared with those obtained for the epoxy network without thermoplastic. thermoplastic. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3931–3935, 2006