The Graft-copolymerization of N-Vinyl Imides toward Preirradiated Polyethylene Film and the Preparation of Anion-exchange Membranes from the Resulting Graft-copolymers

Abstract

The graft-copolymerization of N-vinyl phthalimide and N-vinyl succinimide toward preir radiated polyethylene film and the preparation of anion-exchange membranes from the resulting graft-copolymers were investigated.
Yukalon film (Mitsubishi Petrochemical Co. Ltd., thickness 0.05 mm) of high pressure poly ethylene was used and irradiated with T-rays from a cobalt-60 source to a total dose of 10.5 Mr in an air at room temperature.
The graft-copolymerization toward preirradiated polyethylene. film was carried out under several conditions and results are as follows: (1) The grafting was not influenced in the range from 3 to 45 days by the storage time of preirradiated polyethylene film. (2) The effect of atmosphere on the graft-copolymerization was large and the grafting remarkably reduced by the presence of air. (3) The influence of polymerization temperature was also large and the maximum grafting was obtained at 110° C.
Anion-exchange membranes were prepared by the hydrazinolysis of the resulting graft' copolymers, and the preparation and characteristics of the anion-exchange membranes thus ob tained were tested by the infrared absorption spectrum as shown in Figure 6 and some electro chemical data obtained are shown in Table 2.