ビニル乳濁液中の界面活性剤の定量-6-

概要

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A method for quantitative determination of anionics and nonionics, especially of low HLB values, in vinyl emulsions was investigated with polystyrene or polymethyl methacrylate emulsions. After extraction of surfactants in hot methanol, anionics could be determined by "Methylene Blue Partition Backtitration Method", and nonionics by precipitation in hydrochloric acid solution with phosphotungstic acid and barium chloride, after sorption of anionics and initiator decomposition products on anion exchange resin. Further, it was found that the quantities of nonionics in vinyl emulsions could be estimated nearly equal with those used for synthesizing the emulsions initially. This result may be attributed to the fact that the chain transfer constant for nonionics is too small to be diminished by chain transfer reaction during radical polymerization.
日本油化学会の論文