Detail of "98-04-4"

Reference

The effect of salts and pH on the conformation of quaternary ammonium electrolytes in aqueous solution

The effect of salts and pH on the conformation of quaternary ammonium electrolytes in aqueous solution. Petrariu, Ioan; Steinbaum, Lucian; Petrariu, Pamfilia (Rom.). Rev. Chim. (Bucharest), 28(10), 932-6 (Romanian) 1977. CODEN: RCBUAU. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) The reduced viscosity of aq. solns. of quaternary ammonium polyelectrolytes, prepd. by chloromethylation and amination of polystyrene (I), decreased with increasing concn. due to changes in the nature of bonding and increased mol. mobility. The polyelectrolytes were prepd. by chloromethylation of I, amination with (2-hydroxyethyl)dimethylamine, and, in 1 case, subsequent chlorination of the hydroxyethyl group by treatment with SOCl2. Viscosity measurements were made at 0.10-1.0% concn. in water and in NaCl, NaOH, and HCl solns. (0.005-0.1, 0.1-1.0, and 0.01-0.1N resp.) at 25, 50, and 75°. The reduced viscosity was always lower in the presence of electrolyte solns. and showed the same tendency to increase with decreasing concn., but to a lesser extent than in water. Bu4NI [311-28-4] and Me3PhNI [98-04-4] solns. were used as model compds.