Abstract
Measurements of atomic bromine and CF2 radical concentration profiles, formed at the dissociation of C2F4Br2 molecules behind shock waves, were carried out by means of atomic resonance absorption spectroscopy and molecular resonance absorption spectroscopy. The experiments were performed in mixtures with various concentrations of C2F4Br2 in Ar at the temperatures of 1000–3500 K and pressures of 2–17 bar. As a result the mechanism of C2F4Br2 pyrolysis was investigated and the C2F4 radical dissociation rate constant was determined: kdC2F4 = A exp(-E/RT), where A = 4.76 × 107 s−1 is constant, E = 96 kJmole−1 is the activation energy, R is the perfect gas constant and T is the temperature.
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