X-ray study on the structure of the poly(vinyl alcohol)-iodine complex

Abstract

One-dimensional Fourier transform technique of X-ray meridional intensity is applied to lightly iodinated samples in which the PVA-iodine complex is formed only in the amorphous phase. Thus calculated distribution function showed that a series of peaks with 3.1 Å periodicity appears in much longer distance than expected from that due to I3− or I5− as suggested by Raman data. The values of the lattice size (Lc) and degree of disorder (g) were also estimated from Hosemann plots as Lc=31 Å, g=0.052. All these results from X-ray methods strongly suggest that linear polyiodine chains corresponding to I3− or I5− might be located so as to interfere with each other. © 1991, The Society of Polymer Science, Japan. All rights reserved.