The structure and transport properties of poly(methacrylic acid) in aqueous solution

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Abstract
Diffusion and anisotropic electrical conductivity measurements have been used to investigate the structure of poly(methacrylic acid) in aqueous solution at various degrees of neutralization. Both kinds of measurement indicate that the polyion chain opens from a coiled to an extended configuration as the chain is neutralized. In addition it was found that, at low concentrations, the opening of the chain is a two‐step process, whereas at higher concentrations the mechanism involves a single step.