Hiroya Tanabe

Polarography of Dibutyl Tin Dichloride and Its Application to the Determination of Stabilizers Eluted from Polyvinyl Chloride Films

Dibutyl tin compounds are widely used as the stabilizer of polyvinyl chloride. The determination of such dibutyl tin compounds used can be successfully carried out by square wave polarography using mercuric pool as the electrode. Various kinds of polyvinyl chloride films were manufactured by use of dibutyl tin compounds (chloride, maleate and laurate) as the stabilizer, then the amount of stabilizer eluted by 0.01N hydrochloric acid, 4v/v% acetic acid or 20v/v% ethanol was measured by polarography. From the results it became clear that the organic tin in the stabilizer is more apt to be eluted by ethanol than that in dibutyl tin maleate. The stabilizer was scarcely eluted from rigid polyvinyl chloride in the experimental conditions.