Radicals formed at X- and -radiolysis of glass and liquid tri-n-butylphosphate /TBP/, di-n-butylphosphate /DBP/, di/2-ethylhexyl/phosphoric acid /DEHPA/, tri-p-tolylphosphate /TTP/ and di-n-butyl-n-butyl phopsphonate /DBBPN/ were studied using the technique of spin trap using C-phenyl-N-tert. butylnitrone /PBN/ and 2-methyl-2-nitrosopropane /MNP/ as spin trap agents. When using PBN, nitroxyl radicals generated by the spin trap of hydrogen atoms and labile radicals of phosphates or phosphonate were identified after irradiation in vacuum. Radiation-chemical yield of spin adducts was observed, as well as their thermal stability at 293 K, rate constants and half-time of decay and free activation energy of the decay of spin adducts. Mechanism of generation and decay of nitroxyl radicals is discussed. The spin adducts with MNP have a relatively low stability and superposition of some adducts spectra.
Authors:Simone Pereira da Silva Ribeiro, Luciana Rocha de Moura Estevão, Csaba Novák, and Regina Sandra Veiga Nascimento
intumescent formulation detected a similar behavior and attributed these losses to reactions between APP and PER resulting in a mixture of phosphateesters. In the 350–500 °C range, a marked mass loss is identified. These authors associated this phenomenon to
Authors:Vijayakumar Sarannya, Palanichamy Sivasamy, Nagarajan David Mathan, Thangamani Rajkumar, Durairaj Ponraju, and Chinnaswamy Thangavel Vijayakumar
is thermal protection. Different types of intumescent coating materials have been produced from time to time, to increase the escaping time during fire [ 13 ]. The mechanism of intumescent process may be the phosphateester formation [ 14 ]. When the
ethylene diamine tetraacetic acid (EDTA), N-hydroxyethylene diamine tetraacetic acid (HEDTA), diethylene triamine tetraacetic acid (DTPA), and nitrile triacetic acid (NTA).
Phytic acid is the six phosphateester of inositol. It is known in nine
with the increasing of carbonization temperature and time, which indicates the aromatization extent of carbon material becomes higher. The band at 1,065 cm −1 can be due to P + –O − in acid phosphateesters and to the symmetrical vibration in