Complex Formation of Polyphosphate Sodium with Cationic Polymers

Esen Abikenovich Bekturov, Larisa A. Bimendina

1990

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DOI 10.1080/10426509008040986
Data confidence 70 medium
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Abstract

The products of the interaction of opposite charged complementary macromolecules, the so called polyelectrolyte complexes (PEC) in polyphosphate sodium-hydrochlorided poly-2-vinylpyridine (PPhNa-P2VPy.HCl) and polyphosphate sodium-polynexamethylenguanidine (PPhNa-PMG) systems, are studied. The composition of PEC was determined by electrochemical methods. At [polyanionl]:[polycationl=l (base-mol) ratio the forming stoichiometric complex precipitates. The investigation in solutions were carried out at [polyanionl: :[polycationl=1.25 ratio. In Figure the dependencies of the reduced viscosity of PPhNa-P2VPy.HCl solutions on pH at different degrees of polymerization of PPhNa (n) are given. The curves resemble those for polyampholytes. Probably PEC can be considered as poly-ampholyte in some cases. For PPhNa-PMG systems the ηSP/C-pH dependencies point to the weakly expressed character of complex formation.