Acid/base propertis of poly(4-vinylpyridine) anchored within microporous membranes

摘要

Membranes cosisting of poly(4-vinylpyridine) anchored within the pores of microporous polypropylene and polyethylene membranes exhibit a very large, fully reversible change in permeability over a very narrow pH range (pH valve). A detailed examination of the acid/base properties of the incorporated poly(4-vinylpyridien) ahs been undertaken in order to understand the factors affecting the position (pH) at which this valve operates.