13C and 29Si NMR as a probe to investigate polysiloxanes used in dental applications

The properties of dental mould polymeric materials are strongly influenced by the chemical structure of both the polymer and the catalyst used in the crosslink reaction between them. In order to characterize and suggest some modifications on the materials interfacial interactions, mixtures of Polymer-catalyst were prepared. The polymer and the catalyst chemical structures were obtained by 13C, 1H and 129Si NMR analysis in solution state. From the solution NMR results it was obtained the structure of the polymer and the catalyst and also the kind of the crosslink reaction taken. The CPMAS 1'3C NMR analysis in the solid state were used to identify chemical structure of the polymeric dental moulded sample. (author)