| Autor: |
Naved Azum, Abdullah M. Asiri, Malik Abdul Rub, Abdulrahman O. Al-Youbi, Anish Khan |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Arabian Journal of Chemistry, Vol 9, Iss S2, Pp S1660-S1664 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1878-5352 |
| DOI: |
10.1016/j.arabjc.2012.04.015 |
| Popis: |
The interaction between polyvinylpyrrolidone (PVP) and gemini surfactant (16-5-16) in aqueous solution has been analyzed using conductometry. From conductivity data the critical aggregation concentration (cac), critical micelle concentration (cmc), the effective degree of counter-ion binding (β) at different temperatures were obtained. The thermodynamic parameters, i.e., Gibbs energy of aggregation and micellization, standard enthalpy of aggregation, and standard entropy of aggregation of surfactant/polymer system were estimated, employing pseudophase separation model. The negative values of Gibbs energy and standard enthalpy suggest that the surfactant/polymer aggregation process is spontaneous and exothermic respectively. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
