Adsorption of Poly(Mono‐N‐Alkylmaleate‐Alt‐N‐Vinyl‐2‐Pyrrolidone) Sodium Salts at Air/Water Interface

Autor:	Hernán E. Ríos, Walton J. Cabrera, Carla K. Fonseca, Cristián Brito, Marcela D. Urzúa
Rok vydání:	2006
Předmět:	Aqueous solution Polymers and Plastics General Chemistry Condensed Matter Physics Polyelectrolyte Gibbs free energy Surface tension symbols.namesake chemistry.chemical_compound Adsorption Polyelectrolyte adsorption chemistry Polymer chemistry Materials Chemistry symbols Side chain Methylene
Zdroj:	Journal of Macromolecular Science, Part B. 45:335-342
ISSN:	1525-609X 0022-2348
Popis:	The surface properties of poly(mono‐n‐alkylmaleate‐alt‐N‐vinyl‐2‐pyrrolidone) sodium salts derivatives with n=8, 10, 12, 16, and 18 carbon atoms in the side chain were analyzed. The surface tension behavior suggests that the adsorption at the surface is competitive with the polyelectrolyte “micellization” in the bulk. In fact, polyelectrolytes containing shorter side chains are more active at the surface than are polyelectrolytes with larger lateral chains. The contributions to the standard free energy of the adsorption process, related with their efficiency and effectiveness, were +1.07 kJ and −0.61 kJ per mole of methylene group, respectively. A positive value for the incremental free energy suggests that the gradual addition of methylene groups to the polyelectrolyte side chain actually stabilizes the polyelectrolyte in the bulk solution, whereas a negative value makes the packing process of the polyelectrolyte hydrophobic tails more spontaneous in an arrangement normal to the surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::38121464bdcbc0911ffdae2fef24b05c https://doi.org/10.1080/00222340500523826 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.