Abstract
The biobased aromatic triols were designed and synthesized from oleic acid, 10-undecenoic and erucic acid using optimized chemical reactions and purifications. Three aromatic triols were synthesized followed by cyclotrimerization of stearoyl alcohol, 10-undecyn-1-ol, and behenolic ester to obtain the aromatic triols and aromatic derivatives, and subsequent reduction of carboxylate groups to give primary hydroxyl groups. The analyses of these biobased aromatic triols were performed by nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared (FTIR) spectroscopy. A series of biobased segmented polyurethanes based on these aromatic triols, 1,4-butanediol as a chain extender and 4,4′-methylenebis(phenyl isocyanate) as a coupling agent, were synthesized. The sample materials were prepared with a hard-segment content up to 50%. The morphologies and thermal stability of these polyurethanes were studied by the FTIR spectroscopy, wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and thermogravimetry-differential thermal analysis (TG-DTA). The results showed that it could be feasible to use the renewable resources to manufacture the applicable and green materials.
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