Back to Search
Start Over
Interactions of temperature-responsive anionic polyelectrolytes with a cationic surfactant
- Source :
-
Journal of Colloid & Interface Science . Sep2003, Vol. 265 Issue 1, p214. 6p. - Publication Year :
- 2003
-
Abstract
- The interactions of temperature-responsive copolymers of sodium 2-acrylamido-2-methyl-1-propanesulfonate (AMPS) and <f>N</f>-isopropylacrylamide (NIPAM) with a cationic surfactant, dodecyltrimethylammonium chloride (DTAC), have been studied. The content of AMPS in the copolymers ranged from 1.1 to 9.6 mol%. The surface activity was higher for the polymers with lower AMPS content. It was found that DTAC undergoes association with the polymer chain, forming mixed polymer–surfactant micelles. The values of cac for the polymers were found in fluorescence studies using pyrene as the fluorescent probe. They were in the range 0.9–<f>3.6×10−3</f> M and were lower for polymers with higher AMPS content. An increase in DTAC concentration up to about its cmc results in a decrease of the LCST (lower critical solution temperature) of the copolymers, while further increase above the cmc results in an increase of the LCST. The minimum value of LCST in the presence of the surfactant is lower than the LCST of NIPAM homopolymer. [Copyright &y& Elsevier]
- Subjects :
- *POLYELECTROLYTES
*ANIONS
*SURFACE active agents
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 265
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 10502723
- Full Text :
- https://doi.org/10.1016/S0021-9797(03)00487-9