THERMOGRAVIMETRIC STUDIES OF POLY(OXYMETHYLENE-CO-DIMETHYLSILOXANE) COPOLYMERS

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dc.contributor.authorRODRIGUEZBAEZA, M
dc.contributor.authorZAPATA, M
dc.contributor.authorCARDENAS, G
dc.contributor.authorTAGLE, LH
dc.date.accessioned2024-01-10T14:22:10Z
dc.date.available2024-01-10T14:22:10Z
dc.date.issued1993
dc.description.abstractThe thermal stability and kinetic parameters of a series of poly(oxymethylene-co-dimethylsiloxane) copolymers have been studied by thermogravimetry from 303 to 846K under nitrogen flow. The new copolymers, obtained by ring-opening copolymerization of 1,3,5-trioxane and hexamethylcyclotrisiloxane, contain different concentrations of oxymethylene and dimethylsiloxane comonomer units. The results of the thermal studies were compared with data corresponding to pure poly(oxymethylene) and poly(dimethyl-siloxane). The copolymers with low concentration of dimethylsiloxane comonomer units show only one degradation process, but copolymers richer in this co-unit degrade in two stages. Copolymers with an even higher concentration of dimethylsiloxane co-unit have three decomposition processes. The TGA results indicate that the molecular structure of the copolymers correspond to block copolymers and random copolymers bonded to segments formed by both pure poly(oxymethylene) and poly(dimethylsiloxane). The structures depend on the composition of the copolymers. The pre-exponential factors, the reaction orders and the activation energies have been determined from non-isothermal thermogravimetric data.
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/0040-6031(93)85083-L
dc.identifier.issn0040-6031
dc.identifier.urihttps://doi.org/10.1016/0040-6031(93)85083-L
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79874
dc.identifier.wosidWOS:A1993MC58900008
dc.information.autorucQuímica;Tagle L;S/I;49327
dc.issue.numero1
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final74
dc.pagina.inicio67
dc.publisherELSEVIER SCIENCE BV
dc.revistaTHERMOCHIMICA ACTA
dc.rightsregistro bibliográfico
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleTHERMOGRAVIMETRIC STUDIES OF POLY(OXYMETHYLENE-CO-DIMETHYLSILOXANE) COPOLYMERS
dc.typeartículo
dc.volumen225
sipa.codpersvinculados49327
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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