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Summary: The production of polyols from unrefined vegetable oils by the ozonolysis–hydrogenation process is reported for the first time. The resulting polyols and mono-ols were characterized by GC-FID, DSC, GPC, HPLC, and their acid and hydroxyl numbers, viscosity and molecular weight distribution were determined. Results showed that the physical properties of the refined vegetable oils were different from the unrefined vegetable oils as they displayed higher hydroxyl values. However, the physical properties of the polyols from the unrefined starting materials are expected to be sufficient to be utilized as monomers for the production of polymeric materials. Link: http://www.sciencedirect.com/science/article/pii/S0926669013003531