Micellar polymerization of alkylammonium 2-acrylamido-2-methylpropane sulfonates in the solvents of different polarities and properties of resulting polyelectrolyte-surfactant complexes

Abstract

Polymerization of formerly described novel surfmers polymerizable by counterion has been reported. D o d e c y l a m m o n i u m , c e t y l a m m o n i u m , a n d cetyltrimethylammonium 2-acrylamido-2-methylpropane sulfonates were polymerized in water-dioxane mixtures in a wide range of concentrations of the solvents and in some organic solvents as well. The resulting polyelectrolyte-surfactant complexes precipitated from water-dioxane mixtures. Molecular weights and polymerization yields of the products were the highest at high and low water contents in the reaction mixture, whereas the lowest polymerization degrees and yields conform to solutions, containing 20 % of water. It has been found that the morphology of the precipitated aggregates formed in low-polarity solvents differs considerably from that formed in water. Polymerization in organic media depends strongly on the polarity of the solvent. Contributions of electrostatic and hydrophobic interactions in the structure formation of the complexes were estimated qualitatively.

Colloidal properties of polymerizable counterion surfmers solutions based on alkylamino 2-acrylamido-2-methylpropanesulfonates in different solvents

“…The results obtained by different methods correlate each other and correspond to literature data These results correspond very well to the results obtained by the polymerization of these surfmers. [22] general rule -the higher hydrophobicity, the lower CMC (CTA-AMPS < CA-AMPS < DDA-AMPS).…”

“…One more indirect confirmation of the micelle formation is very high polymerization rate, which is typical for micellar polymerization. [22]…”

“…Both products form tough, transparent, opalescent, and thermally irreversible gels in these solvents. [22] images can be observed for DDA-AMPS solution in pure dioxane.…”

“…[11] The reaction mixture remained Bilibin et al have published some results concerning polymerization of DDA-AMPS, CA-AMPS, and CTA-AMPS in water, water-dioxane mixtures and low-polarity organic solvents. [21,22] The polymerization of these surfmers in micellar aqueous solutions and water-dioxane mixtures occurs with precipitation of insoluble PSC. Polymerization in low-polarity solvents (xylene, tetrachloromethane) results in the formation of tough organogels.…”

“…Polymerization in low-polarity solvents (xylene, tetrachloromethane) results in the formation of tough organogels. [22] These publications contain insufficient information concerning colloidal properties of the micellar solutions of the surfmers designed for the polymerization in different solvents. In the present paper, we fill up this gap in our knowledge.…”