Abstract
AbstractNew oligoetherols with based on cyclotriphosphazene ring were synthesized by functionalization of hexachlorocyclotriphosphazene with glycidol followed by reaction with ethylene glycol and glycerol. Oligoetherols were characterized by IR, 1H-NMR, and MALDI-ToF and hydroxyl number as well as physical properties like density, viscosity and surface tension. The oligoetherols were further converted into polyurethane foams. The rigid foams of enhanced thermal stability and considerably diminished flammability were obtained and their apparent density, water uptake and polymerization shrinkage, thermal conductivity coefficient and thermal stability were determined. The flammability of foams was studied by microcalorimetric methods, horizontal flaming test and oxygen index. The obtained polyurethane foams with incorporated cyclotriphosphazene ring are self-extinguishing.
Graphical abstract
Publisher
Springer Science and Business Media LLC
Subject
Materials Chemistry,Polymers and Plastics,Organic Chemistry,General Chemical Engineering
Reference63 articles.
1. A. Kiliç, J. Qafqaz. Univ. 3, 133 (2000)
2. H. Özay, M. Yildirim, Ö. Özay, Turk. J. Chem. 39, 777 (2015)
3. J. Gruneich, P. Wisian-Neilson, Macromolecules 29, 5511 (1996)
4. H.R. Allcock, Phosphorus-nitrogen Compounds (Academic Press, New York, 1972)
5. D.W.J. Cruickshank, Acta Crystallogr. 17, 671 (1964)