Hydrodynamic and other properties of poly(morpholino) alginamide (PMA)
1994
Gray, C.J. | Philp, K.
Some properties of poly(morpholino) alginamide (PMA) have been investigated. The pH-titration curve and the variation of viscosity with pH of PMA in solution suggest that the very high viscosity of PMA may be associated with the negative charges on the ionised carboxylic acid groups present on the polysaccharide chain. This is supported by the observation of a reversible salt effect which results in complete loss of viscosity in a 0.10% (w/v) sodium chloride solution. These properties, in addition to a non-Newtonian variation of viscosity with shear rate, lead to the suggestion that the PMA consists of long, soluble, rigid chains interconnecting regions of morpholine-substituted polysaccharide.
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