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https://open.uns.ac.rs/handle/123456789/15205
Title: | Tensiometric investigation of the interaction and phase separation in a polymer mixture-ionic surfactant ternary system | Authors: | Katona, Jaroslav Sovilj, Verica Petrović, Lidija Mucić, Nenad |
Issue Date: | 17-Aug-2010 | Publisher: | Belgrade: Serbian Chemical Society | Journal: | Journal of the Serbian Chemical Society | Abstract: | The interaction and phase separation in a ternary mixture composed of hydroxypropyl methyl cellulose (HPMC), sodium carboxymethyl cellulose (NaCMC), and sodium dodecylsulfate (SDS) were investigated by tensiometry. Surface tension measurements of binary mixtures (0.7 % HPMC and 0.00-2.00 % SDS) and of ternary mixtures (0.7 % HPMC, 0.3 % NaCMC, and 0.00-2.00 % SDS) were performed. The measurements indicated interaction between HPMC and SDS, which resulted in HPMC-SDS complex formation. The critical association concentration, CAC, and polymer saturation point, PSP, were determined. Phase separation of ternary HPMC/SDS/NaCMC mixtures occurs at SDS concentration > CAC, i.e., when the HPMC-SDS complex is formed. The volume of the coacervate increases with increasing SDS concentration, and at SDS concentrations > 1.00 %, the coacervate vanishes. The surface tensions (σ) of ternary HPMC/SDS/NaCMC mixtures in the pre-coacervation region and at the onset of the coacervation region are similar to the σ of the corresponding binary HPMC-SDS mixtures, while in the coacervation and post coacervation region, they are close to the σ of the corresponding SDS solutions. | URI: | https://open.uns.ac.rs/handle/123456789/15205 | ISSN: | 03525139 | DOI: | 10.2298/JSC100112056K |
Appears in Collections: | TF Publikacije/Publications |
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