Publication: Compression Elastic Modulus of Neutral, Ionic, and Amphoteric Hydrogels Based on N-Vinylimidazole
dc.affiliation.dpto | UC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química | es |
dc.affiliation.grupoinv | UC3M. Grupo de Investigación: Polímeros y Composites | es |
dc.contributor.author | Valencia, Joaquin | |
dc.contributor.author | Baselga Llidó, Juan | |
dc.contributor.author | Fernández de Piérola, Inés | |
dc.date.accessioned | 2017-11-28T12:20:42Z | |
dc.date.available | 2017-11-28T12:20:42Z | |
dc.date.issued | 2009-06 | |
dc.description.abstract | Several hydrogels of N-vinylimidazole and sodium styrenesulfonate have been prepared by radical cross-linking copolymerization in aqueous solution, using N,N′-methylene-bisacrylamide as crosslinker. Depending on composition, these hydrogels were neutral, amphoteric, cationic or anionic. Compression-strain measurements were performed on samples as-synthesized and swollen in deionized water or in acid aqueous solutions, with and without salt. It was thus found that the cross-linking densities determined by compression measurements on as-synthesized samples are in good accordance with those calculated by means of the model of polymer networks with pendant vinyl groups. A non-Gaussian parameter (β) was introduced to explain that the elastic moduli (G) of samples swollen at equilibrium are larger than predicted by the Gaussian model. The β values of the neutral or ionized systems increase with swelling and fall into a single curve, which denotes a common behavior. Swelling has two opposite effects on G; on the one hand G decreases because the polymer volume fraction diminish and the system shifts from the affine limit to the phantom one; on the other, β increases and contributes to increasing G. The balance of those two opposite effects determines the variation of G with swelling. The possible contribution of ionic crosslinks to ᶹₑ for the polyampholyte and for the polycation wearing divalent counteranions was discussed. A peculiar system is poly(sodium styrenesulfonate), whose cross-linking density is much lower than expected. | en |
dc.description.sponsorship | Financial support from DGI (Spain) under grant CTQ2007-61007/BQU is gratefully acknowledged. | en |
dc.format.extent | 10 | |
dc.format.mimetype | application/pdf | |
dc.identifier.bibliographicCitation | Valencia, J., Baselga, J. & Piérola, I. F. (2009). Compression elastic modulus of neutral, ionic, and amphoteric hydrogels based on N-vinylimidazole. Journal of Polymer Science Part B: Polymer Physics, 47 (11), pp. 1078–1087. | en |
dc.identifier.doi | https://doi.org/10.1002/polb.21712 | |
dc.identifier.issn | 0887-6266 | |
dc.identifier.publicationfirstpage | 1078 | |
dc.identifier.publicationissue | 11 | |
dc.identifier.publicationlastpage | 1087 | |
dc.identifier.publicationtitle | Journal of Polymer Science Part B: Polymer Physics | en |
dc.identifier.publicationvolume | 47 | |
dc.identifier.uri | https://hdl.handle.net/10016/25993 | |
dc.identifier.uxxi | AR/0000006608 | |
dc.language.iso | eng | |
dc.publisher | Wiley Periodicals, Inc. | en |
dc.relation.projectID | Gobierno de España. CTQ2007-61007/BQU | es |
dc.rights | © Wiley, 2009 | |
dc.rights.accessRights | open access | |
dc.subject.eciencia | Materiales | es |
dc.subject.eciencia | Química | es |
dc.subject.other | Compression | en |
dc.subject.other | Crosslinking | en |
dc.subject.other | Degree of crosslinking | en |
dc.subject.other | Elastic modulus | en |
dc.subject.other | Hydrogels | en |
dc.subject.other | Ionic gels | en |
dc.subject.other | Modulus | en |
dc.subject.other | Networks | en |
dc.subject.other | Polyelectrolytes | en |
dc.title | Compression Elastic Modulus of Neutral, Ionic, and Amphoteric Hydrogels Based on N-Vinylimidazole | en |
dc.type | research article | * |
dc.type.hasVersion | AM | * |
dspace.entity.type | Publication |
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