SYNTHESIS AND MECHANICAL PROPERTIES OF POLYURETHANE-MODIFIED EPOXY BASED ON GLYCEROL MONOOLEATE ESTER

Polyurethane-Modified Epoxy (PME) is one of methods in epoxy modification to address some epoxy drawbacks, especially on tensile strength. In this research, epoxy modification using polyurethane has been performed by adding glycerol monooleate ester as polyol. Synthesis of glycerol monooleate ester (GMO) is done via an esterification reaction glycerol with oleic acid with sulfuric acid as catalyst with a yield of 80%. Synthesis of PME based on Ester Glycerol Mono-Oleate (PMEGMO) is performed by reacting epoxy, tolonat and GMOs at 50°C for 30 minutes and produce a yield of 80% Characterization of functional groups and structure of the synthesized GMO and PMEGMO are done by using FTIR and NMR. PMEGMO films is made by adding hardener. Analysis results of the mechanical properties show that the synthesized PMEGMO has two-fold higher tensile strength compared to unmodified epoxy caused by the presence of polyurethane.