Matches in SemOpenAlex for { <https://semopenalex.org/work/W1996962264> ?p ?o ?g. }
- W1996962264 endingPage "8010" @default.
- W1996962264 startingPage "8003" @default.
- W1996962264 abstract "Structural properties of complexes of poly(acrylate) anion (PA) and the cationic surfactants dodecylpyridinium (DPC) and cetylpyridinium chloride (CPC) were investigated by synchrotron X-ray scattering at various degrees of neutralization αN of poly(acrylic acid) (HPA) and at a fixed surfactant:polymer molar ratio. In all scattering curves, one broad (PA−DPC complexes, all αN-values, and PA−CPC complexes, αN = 0) or several sharp peaks (PA−CPC complexes, αN > 0) were observed, pointing to a high degree of ordering in these systems. The fundamental type of organization of surfactant is in the form of polymer-induced micelles that are clustered around the polymer. The multiple reflections in the case of PA−CPC complexes point to a Pm3n cubic structure. The calculated values of structural parameters indicate a larger degree of ordering in complexes at low αN-values (i.e., at αN < 0.5) than that at higher ones. This suggests that the binding of the surfactant by the polyelectrolyte is influenced by factors other than the charge density of polyion. At low αN-values, the micelles are attracted by the polymer mainly through hydrophobic interactions. However, pH measurements have demonstrated that a nonnegligible contribution to attractive surfactant−polymer interactions at αN-values close to 0 comes also from a small but pronounced increase of polymer charge upon surfactant binding. The presence of surfactant gives rise to a nearly 5-fold increase in the degree of ionization of HPA at αN = 0. This increase becomes less pronounced with increasing αN and is negligible for αN ≥ 0.5. From the position of the peaks in the scattering curves, the characteristic distance ā in the complexes was derived. It increases linearly with αN-values in PA−DPC solutions from 30.2 Å at αN = 0 to 36.6 Å at αN = 1, and correspondingly, ā increases from 44.1 to 51 Å in PA−CPC solutions. The ā-value at αN = 0 almost matches one diameter of a globular DPC or CPC micelle. This suggests that the polymer in a coil conformation does not contribute significantly to the intermicellar distance in complexes. It is proposed that micelles are clustered side by side around the polymer coil. The electrostatic repulsion between likely charged micelles could possibly be overcome by the rearrangement of their counterions from the site of binding with the polymer to the solution layer separating them. The ā-value at α N = 1 exceeds that at αN = 0 by 6.4 and 7 Å for DPC and CPC, respectively. This dimension is comparable to the radius of the PA anion, which is around 5.5 Å. This finding indicates that a layer of a fully charged polymer chain at αN = 1 separates the micelles, and in this way, it contributes to the reduction in electrostatic repulsion among them. The linear variation of ā with αN is an indication of a smooth expansion of the PA chain upon neutralization." @default.
- W1996962264 created "2016-06-24" @default.
- W1996962264 creator A5091717691 @default.
- W1996962264 date "2003-06-11" @default.
- W1996962264 modified "2023-10-11" @default.
- W1996962264 title "Study of the Effect of Polyion Charge Density on Structural Properties of Complexes between Poly(acrylic acid) and Alkylpyridinium Surfactants" @default.
- W1996962264 cites W1765555167 @default.
- W1996962264 cites W1967829827 @default.
- W1996962264 cites W1969810364 @default.
- W1996962264 cites W1970567535 @default.
- W1996962264 cites W1971088720 @default.
- W1996962264 cites W1971291310 @default.
- W1996962264 cites W1973047301 @default.
- W1996962264 cites W1973236640 @default.
- W1996962264 cites W1973452894 @default.
- W1996962264 cites W1975744049 @default.
- W1996962264 cites W1975881578 @default.
- W1996962264 cites W1977539317 @default.
- W1996962264 cites W1977811999 @default.
- W1996962264 cites W1978087557 @default.
- W1996962264 cites W1980077165 @default.
- W1996962264 cites W1983248751 @default.
- W1996962264 cites W1983976904 @default.
- W1996962264 cites W1989037186 @default.
- W1996962264 cites W1999479012 @default.
- W1996962264 cites W2000796967 @default.
- W1996962264 cites W2004286543 @default.
- W1996962264 cites W2012056154 @default.
- W1996962264 cites W2018536589 @default.
- W1996962264 cites W2033236932 @default.
- W1996962264 cites W2035500522 @default.
- W1996962264 cites W2037264113 @default.
- W1996962264 cites W2038238699 @default.
- W1996962264 cites W2040340185 @default.
- W1996962264 cites W2042553600 @default.
- W1996962264 cites W2049522996 @default.
- W1996962264 cites W2058347394 @default.
- W1996962264 cites W2068674239 @default.
- W1996962264 cites W2069036023 @default.
- W1996962264 cites W2074423199 @default.
- W1996962264 cites W2075684815 @default.
- W1996962264 cites W2076798177 @default.
- W1996962264 cites W2081581320 @default.
- W1996962264 cites W2085676678 @default.
- W1996962264 cites W2086176838 @default.
- W1996962264 cites W2087830723 @default.
- W1996962264 cites W2088043989 @default.
- W1996962264 cites W2091633182 @default.
- W1996962264 cites W2091665913 @default.
- W1996962264 cites W2094448424 @default.
- W1996962264 cites W2095441734 @default.
- W1996962264 cites W4245674651 @default.
- W1996962264 cites W96768165 @default.
- W1996962264 doi "https://doi.org/10.1021/jp027321c" @default.
- W1996962264 hasPublicationYear "2003" @default.
- W1996962264 type Work @default.
- W1996962264 sameAs 1996962264 @default.
- W1996962264 citedByCount "36" @default.
- W1996962264 countsByYear W19969622642012 @default.
- W1996962264 countsByYear W19969622642013 @default.
- W1996962264 countsByYear W19969622642014 @default.
- W1996962264 countsByYear W19969622642015 @default.
- W1996962264 countsByYear W19969622642018 @default.
- W1996962264 countsByYear W19969622642019 @default.
- W1996962264 countsByYear W19969622642021 @default.
- W1996962264 countsByYear W19969622642023 @default.
- W1996962264 crossrefType "journal-article" @default.
- W1996962264 hasAuthorship W1996962264A5091717691 @default.
- W1996962264 hasConcept C11268172 @default.
- W1996962264 hasConcept C120665830 @default.
- W1996962264 hasConcept C121332964 @default.
- W1996962264 hasConcept C131888329 @default.
- W1996962264 hasConcept C145148216 @default.
- W1996962264 hasConcept C147789679 @default.
- W1996962264 hasConcept C150708132 @default.
- W1996962264 hasConcept C153356533 @default.
- W1996962264 hasConcept C166940927 @default.
- W1996962264 hasConcept C178790620 @default.
- W1996962264 hasConcept C183882617 @default.
- W1996962264 hasConcept C184651966 @default.
- W1996962264 hasConcept C185592680 @default.
- W1996962264 hasConcept C188027245 @default.
- W1996962264 hasConcept C191486275 @default.
- W1996962264 hasConcept C2778206598 @default.
- W1996962264 hasConcept C2779989194 @default.
- W1996962264 hasConcept C2780503075 @default.
- W1996962264 hasConcept C34814092 @default.
- W1996962264 hasConcept C521977710 @default.
- W1996962264 hasConcept C55493867 @default.
- W1996962264 hasConcept C58226133 @default.
- W1996962264 hasConcept C62520636 @default.
- W1996962264 hasConcept C8010536 @default.
- W1996962264 hasConceptScore W1996962264C11268172 @default.
- W1996962264 hasConceptScore W1996962264C120665830 @default.
- W1996962264 hasConceptScore W1996962264C121332964 @default.
- W1996962264 hasConceptScore W1996962264C131888329 @default.
- W1996962264 hasConceptScore W1996962264C145148216 @default.
- W1996962264 hasConceptScore W1996962264C147789679 @default.