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Synthesis of rigid polyurethane foams from phosphorylated biopolyols.
- Source :
- Environmental Science & Pollution Research; Feb2019, Vol. 26 Issue 4, p3174-3183, 10p
- Publication Year :
- 2019
-
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 H<subscript>3</subscript>PO<subscript>4</subscript>. The formation of phosphate polyesters was confirmed by FT-IR and <superscript>31</superscript>P-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. [ABSTRACT FROM AUTHOR]
- Subjects :
- CHEMICAL synthesis
POLYURETHANES
PHOSPHORYLATION
POLYOLS
FOAM
Subjects
Details
- Language :
- English
- ISSN :
- 09441344
- Volume :
- 26
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Environmental Science & Pollution Research
- Publication Type :
- Academic Journal
- Accession number :
- 134560661
- Full Text :
- https://doi.org/10.1007/s11356-017-9765-z