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Preparation and Partial Characterization of Canola-based Epoxy Resins for Bio-based Plastic Composites

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

Citation:  2007 ASAE Annual Meeting  076079.(doi:10.13031/2013.23319)
Authors:   Judith Dolores Espinoza- Perez, Dennis P Wiesenborn, Kristi Tostenson, Chad A Ulven, Morteza Tatlari
Keywords:   oxirane oxygen content, iodine value, epoxidation, viscosity, epoxy resin, biocomposites

Epoxy resins from unsaturated vegetables oils are used in the production of bio-based composites. Such products have a positive economic and environmental impact, because they do not require the addition of volatile reactive diluents. This makes them more desirable from an environmental and workplace safety standpoint. The objectives of the present study were to obtain and partially characterize the epoxides from canola oil and canola methyl ester and evaluate their performance in a fiberglass composite application. Epoxidation was carried out by two methods, using a percarboxylic acid (m-chloroperoxybenzoic acid) and hydrogen peroxide (50%). To evaluate the composite performance, the canola methyl ester epoxy resin and a commercial soybean oil epoxy resin were blended with a synthetic epoxy resin and compared with a 100 % synthetic epoxy resin. The canola-based resin was found to have lower iodine value, lower oxirane oxygen content and lower viscosity compared to the commercial soy-based resin. Flexural modulus and flexural strength of composite samples were decreased with both types of resins in blends with synthetic epoxy, when compared to 100% of synthetic epoxy. Further research is required to improve flexural properties of canola-based epoxy resins to be competitive with soy-based resins.

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