Abstract
Polyurethane acrylate oligomer has been synthetized using microwave irradiation as a green chemistry and synthetized using thermal heating for comparison. Using microwave irradiation, it was possible to either synthesize polyurethane acrylate oligomers without catalyst and/or solvent or achieved at a record time representing 1/12 of the reaction time needed for normal thermal heating. Polyurethane acrylate oligomers synthesized using microwave irradiation possess enhanced thermal stability than the thermal heating synthesized one. The crystallinity percentages of microwave-synthesized polyurethanes are higher than the thermal heating-synthesized polymer. Several experimental measurements applied to the samples like X-ray diffraction (XRD), IR spectra, and transmission electron Microscopy (TEM) etc. The overall morphology of the synthesis of polyurethane acrylate oligomers using microwave irradiation was investigated by TEM, which indicated regular, ordered, and homogeneous polymers within nanosized particle distribution. The disappearance of isocyanate bands on IR charts are strong evidence for the success of the preparation processes for polyurethane acrylate oligomers by all used methods.
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