Abstract
The curing behavior of novolac type phenolic resin was studied through differential scanning calorimetry (DSC) using model fitting and model-free (isoconversion) kinetic methods. For the model fitting kinetic study, a piecewise fitting approach was developed to describe the dependence of cure reaction rate on temperature and curing degree. The piecewise model displayed excellent modeling ability. In the model-free kinetic study, Friedman, and Kissinger-Akahira-Sunose methods were used to calculate the curing activation energy. The dependence curve of activation energy on conversion and the piecewise model fitting results both displayed a change in the kinetic reaction mechanism from the autocatalytic to n-order regime. According to the isothermal prediction results, the model-free kinetic methods show much better prediction ability, compared with the model fitting methods. Also, Friedman and Kissinger-Akahira-Sunose methods were found to show similar results in predicting the isothermal curing behavior of this novolac resin.
Original language | English |
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Pages (from-to) | 63-69 |
Number of pages | 7 |
Journal | Thermochimica Acta |
Volume | 523 |
Issue number | 1-2 |
DOIs | |
State | Published - 20 Aug 2011 |
Externally published | Yes |
Keywords
- Curing behavior
- Differential scanning calorimetry
- Kinetics
- Novolac resin
- Piecewise fitting