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Isothermal differential scanning calorimetry study of a glass/epoxy prepreg
Author(s) -
Hayaty Mehran,
Beheshty Mohammad Hosain,
Esfandeh Masoud
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1607
Subject(s) - differential scanning calorimetry , autocatalysis , materials science , epoxy , diglycidyl ether , isothermal process , activation energy , curing (chemistry) , order of reaction , kinetic energy , thermodynamics , glass transition , reaction rate constant , kinetics , composite material , polymer chemistry , bisphenol a , chemistry , polymer , physics , quantum mechanics
Isothermal differential scanning calorimetry (DSC) was used to study the curing behavior of epoxy prepreg Hexply®1454 system, based on diglycidyl ether of bisphenol A (DEGBA)/dicyandiamid (DICY) reinforced by glass fiber. Cure kinetics of an autocatalytic‐type reaction were analyzed by general form of conversion‐dependent function. The characteristic feature of conversion‐dependent function was determined using a reduced‐plot method where the temperature‐dependent reaction rate constant was analytically separated from the isothermal data. An autocatalytic kinetic model was used; it can predict the overall kinetic behavior in the whole studied cure temperature range (115–130°C). The activation energy and pre‐exponential factor were determined as: E = 94.8 kJ/mol and A = 1.75 × 10 10 sec −1 and reaction order as 2.11 ( m + n = 0.65 + 1.46 = 2.11). A kinetic model based on these values was developed by which the prediction is in good agreement with experimental values. Copyright © 2009 John Wiley & Sons, Ltd.
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