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- W2043220060 abstract "The thermo-oxidative degradation of phosphorus-containing polyurethane (PU) incorporating phenylbis(hydroxyethyl)phosphonate was studied by using thermogravimetric analysis (TGA) and differential thermal analysis (DTA) in oxidizing (air) atmospheres. From the resulting data apparent activation energies (Ea) were obtained following the methods of Flynn, Broido and Ozawa. The activation energy of the first 10% conversion (α) evaluated from a single heating rate (Flynn's and Broido's) method is fairly constant, about 120 and 105 kJmol for common polyurethane and phosphorus-containing copolyurethanes, respectively. The Ozawa method, based on multiple heating rates, is used to evaluate the activation energy at high conversion. It is shown that the average activation energy (129–137 kJmol) for the first 30% conversion in air of the phosphorus-containing copolyurethane decreases with increase in phosphorus content, and Ea (α = 0.4) and Ea (α = 0.5) of the copolyurethanes are greater than that of polyurethane. This greater activation energy may be rationalized on the basis of the formation of thermally stable structures." @default.
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- W2043220060 date "1995-01-01" @default.
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- W2043220060 title "Thermo-oxidative degradation of phosphorus-containing polyurethane" @default.
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- W2043220060 doi "https://doi.org/10.1016/0141-3910(95)00116-4" @default.
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