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Canola-based Epoxy Resins Applied to Plastic Composites

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  RRV07129,  ASABE/CSBE North Central Intersectional Meeting. (doi: 10.13031/2013.24178) @2007
Authors:   Judith Dolores Espinoza Pérez, Dennis P Wiesenborn, Kristi Tostenson, Darrin M Haagenson, , Chad A Ulven, Morteza Tatlari, Cole R Gustafson
Keywords:   Oxirane oxygen content, epoxy resin, bio-composite

Canola-based epoxy resins were obtained by chemical synthesis with peracetic acid derived from the oxidation of acetic acid with hydrogen peroxide in-situ at 50C. The epoxidation reaction was carried out in different experimental systems (a. Mechanical stirring, 491 rpm at 50 C; b. Magnetic stirring, 500 rpm at 25 C, and c. Orbital stirring, 150 rpm at 50 C.). Under the experimental conditions of the mechanical stirring system, the time of the reaction (1, 3, 5, 7, 9h) and the presence of solvent (at 5h) were evaluated. The highest conversion of double bonds to epoxy ring was 92% with the mechanical stirring system at 5h. The epoxidation at 5h without solvent was difficult to recover, however the conversion was the same as in presence of solvent. The qualitative analysis by Fourier transform infrared spectroscopy confirmed the results of the analytical determinations of the oxirane content of the prepared samples. The content of double bonds decrease with the time at 3007 cm-1, while the formation of the epoxy groups at 823.8 cm-1 increased with the time of reaction until 5h, time after which the oxirane content remained constant. FTIR spectrum of a canola epoxy resin at 5h in absence of solvent showed a lightly lower content of epoxy groups than in presence of solvent, which was not detected by the analytical determination of the oxirane oxygen content.

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