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Synthesis of rigid polyurethane foams from phosphorylated biopolyols
- Source :
- Environmental science and pollution research international. 26(4)
- Publication Year :
- 2017
-
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.
- Subjects :
- Thermogravimetric analysis
Polymers
Health, Toxicology and Mutagenesis
Polyesters
Polyurethanes
Oleic Acids
010501 environmental sciences
01 natural sciences
Catalysis
Hydrolysis
chemistry.chemical_compound
Polyol
Environmental Chemistry
Organic chemistry
Plant Oils
Thermal stability
Vitis
Phosphorylation
0105 earth and related environmental sciences
Polyurethane
chemistry.chemical_classification
Chemistry
General Medicine
Pollution
Polyester
Hydroxyl value
Seeds
Fire retardant
Subjects
Details
- ISSN :
- 16147499
- Volume :
- 26
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Environmental science and pollution research international
- Accession number :
- edsair.doi.dedup.....f7d1567b7ac3d6de142408cf5ef35bb7