Reaction kinetics of a novel thermoset nanocomposite: the glycerol diglycidyl ether/3,3-dimethylglutaric anhydride/nano-Al2O3 system |
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Authors: | Abdollah Omrani Abbas Ali Rostami Fatemeh Ravari and Arezou Mashak |
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Institution: | (1) Faculty of Chemistry, University of Mazandaran, P.O. Box 453, Babolsar, Iran;(2) Iran Polymer and Petrochemical Institute, P.O. Box 14965-115, Tehran, Iran |
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Abstract: | Abstract The curing behavior of the glycerol diglycidyl ether/3,3-dimethylglutaric anhydride/nano-alumina system was examined using
a dynamic differential scanning calorimetry technique. The activation energy of the system was calculated using the Kissinger,
Ozawa, Barrett, and two-parameter Sestak–Berggren models. Under the assumption of a constant activation energy and an autocatalytic
mechanism, the activation energy, frequency factor, and total order of reaction were computed. The theoretical reaction rate
was also calculated and compared to the experimental results. Good agreement was seen between the experimental and calculated
data confirming the autocatalytic mechanism. The effect of triethylamine concentration on the reaction rate was clarified
using the Barrett method. Fourier transform infrared spectroscopy (FT-IR) spectroscopy was used to verify the formation of
internal ester groups. Scanning electron microscopy (SEM) and X-ray mapping analyses revealed that the nanofiller was homogeneously
distributed in the continuous phase. |
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