@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS087 prodottidellaricerca:prodotto prodotto:ID51917 . @prefix rdf: . prodotto:ID51917 rdf:type prodotto:TIPO1101 . @prefix retescientifica: . prodotto:ID51917 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID51917 rdfs:label "Cross-linking of Poly(vynil Alcohol) chains by Ca ions in Macro-Defect-Free Cements (Articolo in rivista)"@en . @prefix xsd: . @prefix pubblicazioni: . prodotto:ID51917 pubblicazioni:anno "2002-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID51917 skos:altLabel "
Amore Bonapasta A., Buda F., Colombet P., Guerrini G. (2002)
Cross-linking of Poly(vynil Alcohol) chains by Ca ions in Macro-Defect-Free Cements
in Chemistry of materials
"^^rdf:HTML ; pubblicazioni:autori "Amore Bonapasta A., Buda F., Colombet P., Guerrini G."^^xsd:string ; pubblicazioni:paginaInizio "1016"^^xsd:string ; pubblicazioni:paginaFine "1022"^^xsd:string ; pubblicazioni:numeroVolume "14"^^xsd:string . @prefix ns9: . prodotto:ID51917 pubblicazioni:rivista ns9:ID506332 ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:titolo "Cross-linking of Poly(vynil Alcohol) chains by Ca ions in Macro-Defect-Free Cements"^^xsd:string ; prodottidellaricerca:abstract "In the macro-defect-free cements (MDFs), a cross-linking \nof the polymer chains by Al or Ca ions coming from the \nhydration reactions of the cement paste may have crucial \neffects on the mechanical properties achieved by the \nfinal materials as well as on the material processing. \nIn the present study, the cross-linking of poly(vinyl \nalcohol) (PVA) chains by Ca ions has been investigated \nwith first-principles theoretical methods and compared \nwith a previously investigated case of cross-linking of \npoly(acrylic acid) (PAA) chains. The achieved results \nshow the existence of a Ca-PAA cross-linking that is \nsignificantly more efficient than that realized in the \ncase of the Ca-PVA system. This result implies that the \nCa-O bonds involved in the cross-linking of the PVA and \nPAA chains are affected by the different functional \ngroups present in the two polymer chains and agrees with \nthe improvement of the mechanical properties observed \nwhen the PVA polymer is replaced by the PAA polymer in \nPortland-cement-based MDFs. The achieved results also \nindicate that the Ca-polymer interactions may have \nsignificant effects on the mechanical properties of the \nabove MDFs as well as on their processing. \n\n" ; prodottidellaricerca:prodottoDi istituto:CDS087 . ns9:ID506332 pubblicazioni:rivistaDi prodotto:ID51917 .