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dc.contributor.author
Monopoli, Víctor D.
dc.contributor.author
Pizzio, Luis Rene
dc.contributor.author
Blanco, Mirta Noemi
dc.date.available
2018-08-02T21:52:34Z
dc.date.issued
2008-04
dc.identifier.citation
Monopoli, Víctor D.; Pizzio, Luis Rene; Blanco, Mirta Noemi; Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization; Elsevier Science Sa; Materials Chemistry and Physics; 108; 2-3; 4-2008; 331-336
dc.identifier.issn
0254-0584
dc.identifier.uri
http://hdl.handle.net/11336/54008
dc.description.abstract
New materials, based on a Keggin-structured compound (tungstophosphoric acid) immobilized in a polymeric matrix formed by a blend of polyvinyl alcohol and polyethylenglycol with 400, 2000, and 6000 Da molecular weight, were prepared and characterized. Hydrogels with physical type links were produced, using the freezing-thawing technique, and are an alternative to the matrices traditionally obtained by developing chemical links by the use of cross-linkers. The supported tungstophosphoric acid retained its Keggin primary structure intact. There is evidence of a heteropolyacid-polymeric matrix interaction, which could occur between the [PW12O40]3- Keggin anions and protonated hydroxyl groups C-OH2 + of the support. An effective immobilization was achieved, because there was no anion solubilization when the materials were put in contact with toluene at reflux. By differential scanning calorimetry and thermogravimetrical analysis, it was observed that the materials containing tungstophosphoric acid can be used as catalysts in reactions carried out at temperatures lower than 160-200 °C, without degradation of the solids, the temperature being dependent on the tungstophosphoric acid content and, at a lesser extent, on the polyethylenglycol molecular weight.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Freezing-Thawing
dc.subject
Polyethylenglycol
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Polyvinyl Alcohol
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Tungstophosphoric Acid
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Otras Ingeniería Química
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Ingeniería Química
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-11T15:10:56Z
dc.journal.volume
108
dc.journal.number
2-3
dc.journal.pagination
331-336
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Monopoli, Víctor D.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.description.fil
Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.description.fil
Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.journal.title
Materials Chemistry and Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.matchemphys.2007.09.042
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058407006116
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