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Kinetic parameters estimation for cure reaction of epoxy based vinyl ester resin
Author(s) -
Lee Jhong Ho,
Lee Jae Wook
Publication year - 1994
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760340907
Subject(s) - autocatalysis , epoxy , materials science , isothermal process , reaction rate , thermodynamics , order of reaction , differential scanning calorimetry , kinetic energy , kinetics , vitrification , reaction rate constant , chemical kinetics , composite material , organic chemistry , chemistry , catalysis , physics , quantum mechanics , nuclear physics
Abstract A new graphical estimation technique is proposed for the determination of the kinetic parameters describing an autocatalytic reaction. A differential scanning calorimeter was used to monitor the reaction kinetics of an epoxy‐based vinyl ester resin. The method utilizes information from a zero initial reaction rate, conversation at vitrification, the ratio of reaction rate constants under different isothermal conditions, and characteristics of the phenomenological kinetic model with assumptions being made about the overall reaction order. By fitting data to the integrated reaction rate equation with adjustments for the isothermal conditions, the kinetic parameters are estimated without using a linear or nonlinear regression method. Different kinetic parameters can be estimated from data before and after the gel point which was obtained from the relationship between the glass transition temperature and the degree of cure.