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Properties of polyelectrolytes: Maleic acid-vinylpyrrolidone copolymers—2. Potentiometric behaviour in dilute solution

✍ Scribed by H. Ríos; L. Gargallo; D. Radić

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
272 KB
Volume
21
Category
Article
ISSN
0014-3057

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✦ Synopsis

The potentiometric behaviour of mateic acid-vinylpyrrolidone copolymer p(MA-co-VP) was studied as a function of added (1 : 1) electrolyte. The copolymer composition as well as the first and second intrinsic ionization values pK 0 were determined. The values of pK~), pK 0 and AG O (the standard electrostatic and conformational free energy change) were found to depend on the ionic strength. Also it was found that AG O approaches a constant value when the added electrolyte concentration exceeded 0.5 M and the polyacid behaves like its monomeric analogue.

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