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Potentiometric pH response of membranes prepared with various aminated-poly (vinyl chloride) products
Authors:Shu -Ching Ma  Mark E Meyerhoff
Institution:(1) Department of Chemistry, University of Michigan, 48109 Ann Arbor, MI, USA
Abstract:The preparation and potentiometric pH response properties of membranes formulated with various aminated-poly(vinyl chloride) (PVC-NH2) products are described. Products containing secondary and/or primary amino functional groups are obtained by modifying PVC with mono- and/or diamines, respectively. Blank membranes prepared with either type of aminated-polymer exhibit nearly Nernstian potentiometric pH responses over different pH ranges. In general, membranes based on diamino products exhibit pH response over a wider range (5–10.5) than membranes formulated with monoamino products (<8.0). These potentiometric results are used to estimate the basicity of the various primary and secondary amino sites in the membrane phases.Dedicated to Professer W. Simon on the occasion of his 60th birthday
Keywords:aminated poly(vinyl chloride)  pH sensors  neutral carriers  polymer membrane electrodes
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