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Phosphorus–nitrogen containing fire retardants for poly(butylene terephthalate)
Author(s) -
Levchik Galina F,
Grigoriev Yury V,
Balabanovich Alexander I,
Levchik Sergei V,
Klatt Martin
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/1097-0126(200010)49:10<1095::aid-pi405>3.0.co;2-b
Subject(s) - fire retardant , phosphorus , materials science , nitrogen , composite material , polymer chemistry , chemistry , organic chemistry , metallurgy
Hexakis(phenylamino)cyclotriphosphazene, hexakis(phenoxy)cyclotriphosphazene, tris( o ‐phenylenediamino)cyclotriphosphazene, tris(phenylene‐1,2‐dioxy)cyclotriphosphazene and tris(phenylene‐1‐amino‐2‐oxy)cyclotriphosphazene have been prepared and characterized by IR and NMR spectroscopy. Phospham, a crosslinked phosphazene imide (PN 2 H) n , was prepared by heating hexaminotricyclophosphazene under vacuum. Phosphorus oxynitride (PON) m which is likely to be a crosslinked oxyphosphazene was prepared by intense heating of urea, melamine and phosphoric acid. These phosphorus–nitrogen containing compounds added to poly(butylene terephthalate) (PBT) at 10–20 wt% provided increase of oxygen index (OI) from 22 to 29. In spite of relatively high OI only the V‐2 rating was observed in the UL94 test because of the flaming drip phenomenon. Phosphorus oxynitride was found to be an efficient char promoter for PBT. © 2000 Society of Chemical Industry