Synthesis of new supramolecular elastomers from sunflower oil and palm acid oil

Abstract

New supramolecular elastomers were synthesized using vegetable oil materials namely palm acid oil (PAO) and sunflower oil (SFO). The oils were first epoxidized by using formic acid and hydrogen peroxide. The epoxidized oils and adipic acid (AA) were then reacted to make polyacids, mainly triacid. Molar ratio of 1:10 for epoxidized oils and AA led to the formation of higher reactive groups of synthesized polyacid without gelation. Finally, diethylenetriamine (DETA) was added to polyacid to yield oligomers and a polycondensation with urea performed to achieve the desired elastomers. The synthesized materials were characterized by using Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) in order to determine structure and type of bonding. The spectra reveals that the synthesized oligomers are contained amide groups that correctly formed from reaction of amine groups of DETA and acid functionality of polyacids. Moreover, the resulted structures show the formation of multiple hydrogen-bonding in the elastomers.