Affiliation:
1. Beijing University of Chemical Technology
Abstract
A novel phosphazene cyclomatrix network polymer was synthesized via nucleophilic
displacement of activated nitro groups of tri(4-nitrophenoxy)tri(phenoxy) cyclotriphosphazene with
the hydroxyls of bisphenol A. Then, thermal properties of the polymer was investigated using
dynamic thermogravimetric analysis (TGA) in air, pyrolysis and combustion experiments.
According to the relation among the pyrolysis residue (CR) at 850°C, the char-forming tendency
(CFT) of every structural unit in polymer and the limiting oxygen index (LOI), CFT of the
structural unit (-P=N-)3 and the LOI of the polymer were calculated as 35.04 and 34.3 respectively,
which provided theoretical parameter for designing the cyclomatrix- or cyclo- phosphazene
polymers with highly thermal and flame-retardant properties.
Publisher
Trans Tech Publications, Ltd.
Reference3 articles.
1. R. De Jaeger and M. Gleria: Prog. Polym. Sci. Vol. 23 (1998), p.179.
2. D.W. Van Krevelen: Properties of Polymers, Their Eestimation and Correlation with Chemical Structure (Elsevier, Amsterdam-Oxford-NewYork 1976).
3. T. Zhang, Q. Cai, D.Z. Wu and R.G. Jin: J. Appl. Polym. Sci. Vol. 95 (2005), p.880.
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