This study describes development of 1,1,1-trichloroethane removal from aqueous solutions. The decomposition of aqueous 1,1,1-trichloroethane is more extensive with combined photolysis and sonolysis process than each separately. The extent of decomposition is measured by gas Chromatograph for removal of CCl 3 CH 3 , by a turbidometric procedure for production of chloride ions, and Fourier transform infrared spectroscopy for solid product. The concept is to degrade CCl 3 CH 3 in water flow systems to chloride ions, which are removable by ion-exchange column.
Perfluorobutadiene was polymerized in bulk under low pressure and temperature in the presence of diisopropyl peroxydicarbonate, bis(trifluoromethyl) peroxide, and benzoyl peroxide. Fractional solvent extraction of polyperfluorobutadiene by n‐hexane and hexafluorobenzene into three polymeric fractions was described. The hexafluorobenzene‐soluble fraction was used for crosslinking studies. Direct fluorination of solid polyperfluorobutadiene required no catalyst. The fluorine–polyperfluoropolyene reactions furnished a mechanism for crosslinking the unsaturated chains. Fluorination by gaseous fluorine formed free radical sites on the polymer chains besides saturation reactions. The presence of excess monomer in contact with these partially fluorinated solid polyperfluorobutadienes under controlled conditions were capable of crosslinking and grafting to the linear chains. Direct fluorination of solid polyperfluorobutadiene tends to involve reaction with the internal double bonds rather than the pendant perfluorovinyl group; the converse is true for crosslinking with hexamethylenediamine. The mechanisms are discussed.
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