Abstract
Water vapor permeability of poly(vinyl alcohol) (PVA) films modified by graft polymerizing by means of irradiation was measured. lt was recognized that water vapor permeability of PVA film was decreased by the grafting of styrene. Water vapor permeability of films whose graft percentage was greater than 400% was approximately equal to that of polystyrene fiim.On the basis of the water vapor permeability data, decrease in water vapor permeability was found less effective in PVA films modified by graft polymerizing styrene than that of laminating films of PVA and polystyrene.
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