Preparation and interfacial properties of comb-shaped polymeric surfactants with polyurethane backbone having dodecyl and polyethylene glycol chains as the side chains

作者：Takachi K^*; Taniguchi T; Kawaguchi S; Nagai K

来源：Kobunshi Ronbunshu, 2003, 60(2): 84-91.

• polymeric surfactant
• comb-shaped polymer
• polyurethane
• surface activity
• micelle-forming property

This paper describes syntheses of novel comb-shaped polymeric surfactants (PUSs) with polyurethane chain as the backbone and dodecyl and polyethylene glycol (PEG) groups as the side chains. The estimation of surface-active and micelle-forming properties of the PUSS in aqueous media was completed. Aqueous solutions of the PUSS with low contents of dodecyl chain exhibited cloud points at 60 to 80 degreesC, but those of the PUSS with high contents did not show such points below 100 degreesC. Surface activity of the PUSS was the highest at 17 mol% dodecyl chain to total side chains, within the results obtained in this study, and this activity become lower at higher contents of dodecyl chain. Micelle formation of the PUSS occurred above their critical micelle concentrations, which decreased with increasing the content of dodecyl chain. Reduction of surface activity at higher content of dodecyl chain in PUSS can be ascribed to the fact that the micelle formation of PUSS preceded their adsorption at air/water interface.

• 出版日期2003