Electrophoresis and Colloid Titration of P61y-(N, N-dimethyldiallylammonium chloride)

Electrophoretic mobility of poly(N, N-dimethyldiallylammonium chloride) (PDDA) was measured at the ionic strength of 0.1 and in the pH range of 3-10, using buffer solution of HCl-NaCl, CH3COOH-CH3COONa, Na2HPO4-KH2PO4, and Na2C03-NaHCO3. On the other hand, the colloid titration of PDDA with potassium poly(vinyl alcohol) sulfate (PVSK) was carried out in salt-free aqueous solution at various pH. From the above two different experiments, the effec t of pH on the dissociation of PDDA was investigated. Both results have been compared with those of trimethyl ammonium glycol chitosan iodide reported in our previous paper, and the mechanism of the formation of polyion complex between PVSK and PDDA has been discussed.