Application of non-isothermal cure kinetics on the interaction of poly(ethylene terephthalate) - Alkyd resin paints
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Dias, D. S. [UNESP]
Crespi, Marisa Spirandeli [UNESP]
Ribeiro, Clovis Augusto [UNESP]
Fernandes, J. L S [UNESP]
Cerqueira, H. M G [UNESP]
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Samples of paint (P), reused PET (PET-R) and paint/PET-R mixtures (PPET-R) were evaluated using DSC to verify their physical-chemical properties and thermal behavior. Films from paints and PPET-R are visually similar. It was possible to establish that the maximum amount of PET-R that can be added to paint without significantly altering its filming properties is 2%. The cure process (80-203°C) was identified through DSC curves. The kinetic parameters, activation energy (E a) and Arrhenius parameters (A) for the samples containing 0.5 to 1% of PET-R, were calculated using the Flynn-Wall-Ozawa isoconversional method. It was observed that for greater amounts of PET-R added, there is a decrease in the E a values for the cure process. A Kinetic compensation effect (KCE), represented by the equation InA=-2.70+0.31E a was observed for all the samples. The most suitable kinetic model to describe this cure process is the autocatalytic Šesták-Berggreen, model applied to heterogeneous systems. © 2007 Springer Science+Business Media, LLC.
Paint, Paint/PET-R mixture, PET, Activation energy, Alkyd resins, Film growth, Mathematical models, Polyethylene terephthalates, Reaction kinetics, Thermal effects, Alkyd resin paints, Nonisothermal curing
Journal of Thermal Analysis and Calorimetry, v. 91, n. 2, p. 409-412, 2008.