Sequence length required for poly(vinyl acetate)-iodine and poly(vinyl alcohol)-iodine color reactions.

Abstract

An oligomeric mixture of poly(vinyl acetate) (PVAc) was subjected to preparative gel-permeation chromatography, yielding pure n-mer in the range of n=4—14. These n-mers, fractionated poly (vinyl acetate), and derived poly (vinyl alcohol) were used to study their color reaction with iodine in order to find the lower limits of the degree of polymerization for these reactions. In the poly(vinyl acetate)—iodine reaction the red-violet color began to appear at 12-mer. Tetradecamer was not long enough for the blue-color reaction of poly(vinyl alcohol)—iodine. © 1978, The Society of Polymer Science, Japan. All rights reserved.