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Synthesis and Characterization of Jatropha Curcas Oil-Based Alkyd Resins and Their Blends with Epoxy Resin

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Alkyd resins based on Jatropha curcas oil with different molar ratios of phthalic anhydride (PA) and maleic anhydride (MA) were prepared by alcoholysis followed by polyesterification reaction. The progress of the reaction was traced by the determination of acid value at regular time intervals. From the kinetic study the extent of the reaction was found in the range of 52.4–61.2%. The prepared resins were blended with a commercially available fast-curing epoxy resin in order to improve the properties like curing time, chemical resistance, tensile strength, and thermal stability. The morphology study of the blends showed good compatibility of alkyd and epoxy resins. On blending with epoxy the tensile strength of the alkyd resins improved significantly and the thermal stability increased by 20°C. From the various properties of the blends it was observed that the blend with 100% phthalic anhydride has the best performance characteristics and is the most efficient. The blends possess properties that are much more superior in many aspects than the individual components and have potential for application as coatings.
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Keywords: ALKYD RESIN; BLEND; COATING; EPOXY; JATROPHA CURCAS OIL; TENSILE STRENGTH

Document Type: Research Article

Publication date: 27 May 2015

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