caa a22 4500 475763599 CHVBK 20180406123558.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s003960050550 doi (NATIONALLICENCE)springer-10.1007/s003960050550 Bakshi M. S. Department of Chemistry Guru Nanak Dev University Amritsar 143005, Punjab, India e-mail: ms_bakshi@yahoo.com, IN aut Interactions between cationic mixed micelles and poly(vinyl pyrrolidone) [Elektronische Daten] [M. S. Bakshi]  The conductances of trimethyltetradecylammonium bromide (TTAB) + trimethylhexa decylammonium bromide (HTAB) and TTAB + trimethyldodecylammonium bromide (DTAB) mixtures over the entire mole fraction range were measured in aqueous poly(vinyl pyrrolidone) (PVP) containing 1-10 wt% PVP at 30 °C. Each conductivity (κ) curve for the TTAB + HTAB mixtures showed two breaks corresponding to two aggregation processes over the whole mole fraction range, except in the case of pure TTAB, where a single break corresponding to the conventional critical micelle concentration (cmc) was observed. In the case of TTAB + DTAB mixtures, each κ curve at a particular mole fraction of TTAB showed only one break, which was quite close to a similar one in pure water. In TTAB + HTAB mixtures, the first break is called the critical aggregation concentration. It is close to the conventional cmc and is attributed to the polymer-free micelle formation, whereas the second break is due to the polymer-bound micellar aggregates. However, no polymer-bound micellar aggregation process was observed in the case of TTAB + DTAB mixtures. Therefore, the presence of micelle-PVP interactions in the TTAB + HTAB case have been attributed to the stronger hydrophobicity of HTAB or TTAB + HTAB micelles in comparison to that of single or mixed micelles of TTAB + DTAB mixtures. From the conductivity data, various micelle parameters in the presence of PVP have been computed and discussed in terms of micelle-polymer interactions. The mixing behavior of TTAB +  HTAB corresponding to the first break, and that of TTAB + DTAB mixtures in the presence of PVP, is close to ideal and is also identical to that in pure water. Springer-Verlag Berlin Heidelberg, 2000 Key words Cationic surfactants nationallicence Mixed micelles nationallicence Poly(vinyl pyrrolidone) nationallicence Conductivity measurements nationallicence Mixed micelle nationallicence polymer interactions nationallicence https://doi.org/10.1007/s003960050550 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050550 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bakshi M. S. Department of Chemistry Guru Nanak Dev University Amritsar 143005, Punjab, India e-mail: ms_bakshi@yahoo.com, IN aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer