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Langmuir 1999, 15, 4306-4310
Salt Effect on Formation and Properties of Interpolyelectrolyte Complexes and Their Interactions with Silica Particles† Heide-Marie Buchhammer,* Gudrun Petzold, and Klaus Lunkwitz Institute of Polymer Research Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany Received August 6, 1998. In Final Form: December 8, 1998
The influence of low-molecular-mass salt, namely NaCl, on the properties of interpolyelectrolyte complexes (PECs) formed as a result of interactions between poly(diallyldimethylammonium chloride)(PDADMAC) and copolymers of maleic acid with propene [P(MS-P)] or methylstyrene [P(MS-R-MeSty)] in their saltcontaining nonstoichiometric mixtures has been studied by means of turbidimetry, quasi-elastic light scattering, and laser-Doppler microelectrophoresis. It has been found that stable dispersions of positively charged PEC particles could be prepared at low salt concentration. The hydrodynamic radius of these PEC particles formed at a salt concentration
