Smog chambers equipped with FTIR spectrometers were used to study the Cl atom and OH radical initiated oxidation of CH 3 O(CF 2 CF 2 O) n CH 3 (n ) 1-3) in 720 ( 20 Torr of air at 296 ( 3 K. Relative rate techniques were used to measure k(Clwere recorded and used to estimate halocarbon global warming potentials of 0.051, 0.058, and 0.055 (100 year time horizon, relative to CFC-11) for CH 3 OCF 2 CF 2 OCH 3 , CH 3 O(CF 2 CF 2 O) 2 CH 3 , and CH 3 O(CF 2 CF 2 O) 3 -CH 3 , respectively. Results are discussed with respect to the atmospheric chemistry of hydrofluoropolyethers (HFPEs).
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