4-Bromosalicylic acid (BS) was condensed with various proportions of formaldehyde using different acid catalysts. The polymer samples have been characterized by IR spectral studies, by their number-average molecular weight (M n), and by TGA. Viscosity measurements of selected polymer samples in DMF showed that their solutions exhibited polyelectrolyte behavior. The intrinsic viscosity [η] of the polymer samples were measured in 80:20 (v/v) DMF/water containing 1% KBr, a medium in which the polymers exhibited normal behavior. Metal chelates of one polymer sample are characterized. Ion-exchanging properties of the same sample are studied by application of the batch equilibrium method
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Patel et al. (1982) studied this question.
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