Acrylic acid Bromates

Redox polymerisations of acrylic acid in inverse dispersion and in aqueous solution (surfactant) were carried out using sodium metabisulphite/potassium bromate initiators. Experimental rate expressions indicated that complex reactions were involved in the polymerisations. A chemical reaction scheme was suggested and kinetic models were developed for the redox polymerisation in aqueous solution. Differences in the experimental rate expressions between the redox polymerisation in inversion dispersion and that in aqueous solution agreed well with the kinetic model predictions. 23 refs. 

The residual double bonds of poly(methyl acrylate) have been determined by bromination [9,27]. Bromination is accomplished through the addition of potassium bromide to potassium bromate in acidic medium [9]. Styrene-butadiene copolymers contain residual double bonds. The butadiene content of the copolymer has been determined by an iodine monochloride titration procedure [9],... 

The determination of propiolactone with thiosuUate has been described by T ler and Reering it cannot as a rule be applied to the homologs (see section VI.4.C ). The determination of acrylic add with a mixture of potassium bromate and hromide and that of the total acidity by direct -titrstion with sodium methylate in anhydrous methanol have been discussed in the booklets edited by members of the Celanese Corporation of America, They recommend mass cpeciro-graphy for the evaluation of the lactons content of oommerical products and for the detection of certain impurities. 

BARIUM BROMATE (13967-90-3) A strong oxidizer. Reacts with water, forming bromic acid. Explosive decomposition in elevated temperatures above 500°F/260°C. Violent reaction with reducing agents. Incompatible with combustible materials, aluminum, arsenic, carbon, copper, metal sulfides, finely divided metals, organic substances, phosphorus,. sulfur. Aqueous solution is incompatible with organic anhydrides, acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cresols, caprolactam solution, epichlorohydrin, ethylene dichloride, glycols, isocyanates, ketones, maleic anhydride, nitrates, nitromethane, phenols, vinyl acetate. 

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