Abstract
The swelling in water and in ionic surfactant solutions of a polymer gel based on poly(acrylamide) (PAm) with pendent poly(ethylene oxide) (PEO) chains (0−2.6 mol %) was investigated. In pure water, the swelling increased linearly with the content of PEO side chains. The anionic surfactants sodium dodecyl sulfate (SDS) and sodium octylbenzenesulfonate (SOBS) both bound to the PEO side chains above a critical association concentration (cac). For SOBS, binding isotherms to the gels were obtained, and the cac values for the surfactant in PEO solutions were determined by NMR, both at varying concentrations of added NaCl. Both surfactants affected the swelling of the copolymer gels similarly. When the surfactant concentration in the swelling medium was increased at low concentrations of added NaCl, a substantial swelling occurred at the cac, and the volume continued to increase up to a concentration just above the critical micellization concentration (cmc) for the free surfactant in the swelling medium. At hig...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
