Curing behavior of a novolac‐type phenolic resin analyzed by differential scanning calorimetry |
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| Authors: | Eliton S De Medeiros Jos A M Agnelli Kuruvilla Joseph Laura H De Carvalho Luiz H C Mattoso |
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| Affiliation: | Eliton S. De Medeiros,José A. M. Agnelli,Kuruvilla Joseph,Laura H. De Carvalho,Luiz H. C. Mattoso |
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| Abstract: | Curing of a novolac‐type phenolic resin was studied by DSC. The kinetic analysis was performed by means of the dynamic Ozawa method at heating rates of 5, 10, 15, and 20°C/min. This analysis was used to determine the kinetic parameters of the curing process. The activation energy was found to be 144 kJ/mol. It was found that the Ozawa exponent values decreased with increasing reaction temperature from 3.5 to 1, suggesting a change in the reaction mechanism from microgel growth to diffusion‐controlled reaction. The reaction rate constant was found to range from 123.0 to 33.6 (°C/min)n. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 1678–1682, 2003 |
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| Keywords: | kinetics differential scanning calorimetry (DSC) phenolic resins Ozawa method microgels |
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