Modifying the thermosensitivity of copolymers of sodium styrene sulfonate and N-isopropylacrylamide with dodecyltrimethylammonium chloride
| Autor: | Maria Nowakowska, Krzysztof Szczubiałka, Mirosław Grębosz |
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| Rok vydání: | 2004 |
| Předmět: |
stimuli-responsive polymers
NIPAM Polymers and Plastics lower critical solution temperature Comonomer critical aggregation concentration Micelle Lower critical solution temperature SSS Polyelectrolyte Styrene chemistry.chemical_compound Colloid and Surface Chemistry chemistry Pulmonary surfactant Ionic strength Polymer chemistry Materials Chemistry Copolymer Physical and Theoretical Chemistry |
| Zdroj: | Colloid and Polymer Science. 283:291-298 |
| ISSN: | 1435-1536 0303-402X |
| DOI: | 10.1007/s00396-004-1142-z |
| Popis: | The interactions between copolymers of sodium styrene sulfonate (SSS) and N-isopropylacrylamide (NIPAM), anionic polyelectrolytes, and dodecyltrimethylammonium chloride (DTAC), a cationic surfactant, were studied in aqueous solutions of various ionic strengths. The copolymers were found to be thermoresponsive, showing a lower critical solution temperature (LCST). The influence of the polymer composition, the surfactant concentration, and the ionic strength on the LCST was studied. The surfactant was found to interact strongly with the polymer, forming mixed polymer-surfactant micelles. The critical aggregation concentration (cac) of the polymer-surfactant system was found from fluorescence spectroscopy using pyrene as a fluorescent probe. A strong dependence of the anionic polyelectrolyte-cationic surfactant interactions on the structure of the ionic comonomer was observed. |
| Databáze: | OpenAIRE |
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