T. Yosomiya et al., POLARIZATION CHARACTERISTICS OF POLY(VINYL ALCOHOL) FILMS CONTAINING METAL IODIDE, Die Angewandte makromolekulare Chemie, 230, 1995, pp. 171-178
The polarization properties of iodine complex layer deposited by oxida
tion of poly(vinyl alcohol) (PVA) containing metal iodide were investi
gated. Heat-resistant polarizing films with high polarization efficien
cy were produced by oxidizing and stretching the PVA containing metal
iodide. The results indicate that i) the polarization efficiency of a
polarizing film prepared by oxidation of a PVA film containing 1 mmol
or more of potassium iodide (KI)/g PVA at 0 degrees C for 120 s in a 1
0 wt.-% aqueous solution of H2O2 and a degree of stretching of 400% is
high, ii) the heat resistance of the polarizing film in this experime
nt is higher than that of a filter prepared from a commercial PVA film
.