Premium
Comparative study of the cure kinetics of an unsaturated polyester resin using different procedures
Author(s) -
Salla Josep M.,
Ramis Xavier
Publication year - 1996
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.10471
Subject(s) - differential scanning calorimetry , kinetics , activation energy , materials science , isothermal process , kinetic energy , polyester , thermodynamics , composite material , polymer chemistry , chemistry , physics , quantum mechanics
The cure kinetics of an unsaturated polyester resin were studied by differential scanning calorimetry (DSC), and different dynamic and isothermal procedures were compared. It was established that the isothermal kinetic analysis through the isoconversional adjustment ln t = A + E/RT is the method that offers the most accurate results for unsaturated polyester resin cure kinetics. From this comparative study it was noted that the activation energy not only varies according to the degree of conversion but also according to the method used to evaluate the kinetic parameters. Furthermore, it was shown that the activation energy cannot be separated from the other adjustment parameters, so the different kinetic procedures used are not generally comparable. Different methods of evaluating the degrees of conversion α and the reaction rates d α/ dt according to the experimental reaction heat were also studied. It was found that the method used has a strong influence on the values of α and d α/ dt , but only a slight one on the kinetic parameters.