Comparative study of the cure kinetics of an unsaturated polyester resin using different procedures

Polymer Engineering and Science - Tập 36 Số 6 - Trang 835-851 - 1996
Josep María Salla1, Xavier Ramis1
1Laboratori de Termodinàmica de la E.T.S.E.I.B. Universitat Politècnica de Catalunya Barcelona 08028, Spain

Tóm tắt

AbstractThe 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 lnt = 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 dα/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 dα/dt, but only a slight one on the kinetic parameters.

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Thông tin xuất bản

Polymer Engineering and Science

Tập 36 Số 6

835-851

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