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- W2745684312 abstract "Renewable resources are playing a key role on the synthesis of biodegradable polyols. Moreover, the incorporation of covalently linked additives is increasing in importance in the polyurethane (PU) market. In this work, previously epoxidized grape seed oil and methyl oleate were transformed into phosphorylated biopolyols through an acid-catalyzed ring-opening hydrolysis in the presence of H3PO4. The formation of phosphate polyesters was confirmed by FT-IR and 31P-NMR. However, the synthesis of a high-quality PU rigid foam was not possible using exclusively these polyols attending to their low hydroxyl value. In that way, different rigid PU foams were prepared from the phosphorylated biopolyols and the commercial polyol Alcupol R4520. It was observed that phosphorylated biopolyols can be incorporated up to a 57 wt.% in the PU synthesis without significant structural changes with respect to the commercial foam. Finally, thermogravimetric and EDAX analyses revealed an improvement of thermal stability by the formation of a protective phosphorocarbonaceous char layer." @default.
- W2745684312 created "2017-08-31" @default.
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- W2745684312 date "2017-08-18" @default.
- W2745684312 modified "2023-10-16" @default.
- W2745684312 title "Synthesis of rigid polyurethane foams from phosphorylated biopolyols" @default.
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- W2745684312 doi "https://doi.org/10.1007/s11356-017-9765-z" @default.
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