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A Method of Estimating Kinetic Parameters of Thermoset Cures: Application to a Dicyanate Ester Resin
Author(s) -
Leroy Eric,
Dupuy Jerome,
Maazouz Abderrahim
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010201)202:4<465::aid-macp465>3.0.co;2-z
Subject(s) - thermosetting polymer , kinetic energy , isothermal process , kinetics , thermodynamics , activation energy , polymer chemistry , work (physics) , materials science , inverse , chemistry , differential scanning calorimetry , composite material , physics , mathematics , quantum mechanics , geometry
In this work, temperature modulated DSC is used to measure the heat flow evolved during the cure reaction of a dicyanate ester resin. This technique enables the heat capacity contribution to be separated from the heat source term (from the kinetic behavior) in nonisothermal conditions. At any given moment, therefore, the true reaction rate can be calculated without any assumptions about the shape of the baseline of the thermogram. Resulting accurate data are used for the characterization of cure kinetics. The isoconversional analysis shows that the apparent activation energy varies with conversion degree, so that a Kamal & Sourour kinetic model is proposed. Its kinetic parameters are obtained by an inverse method, and such a model is successfully used to simulate nonisothermal, isothermal and multistep cure experiments.