2441-28-3Relevant articles and documents
THERMAL AND THERMOOXIDATIVE STABILITY OF OZONE-SAFE FREONS
Buravtsev, N. N.,Grigor'ev, A. S.,Kolbanovskii, Yu. A.,Ovsyannikov, A. A.
, p. 1880 - 1890 (2007/10/03)
The thermal stability of freons 134-a (CF3CH2F), 134 (CHF2CHF2), and 133-a (CF3CH2Cl) was studied experimentally by the pulsed adiabatic compression method.The conversion of the freons, beginning at a value of 0.0002, was determined from the carbon balance of the reaction products, calculated from the chromatographic data.The Arrhenius expressions for the total rate constants of thermal decomposition of the freons are presented.The intermediates of the thermal transformations of the freons were recorded by kinetic spectroscopy in the ultraviolet and visible regions.The UV spectrum of the carbene :CHCF3 with characteristic absorption maxima at λ 235 and 430 nm is described for the first time.