Morphology and thermal properties of two polymethacrylates modified by a polymer liquid crystal

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dc.contributor.authorBrostow, W
dc.contributor.authorGargallo, L
dc.contributor.authorHormazabal, A
dc.contributor.authorJaklewicz, M
dc.contributor.authorMenard, KP
dc.contributor.authorOpazo, A
dc.contributor.authorRadic, D
dc.date.accessioned2024-01-10T12:06:46Z
dc.date.available2024-01-10T12:06:46Z
dc.date.issued2004
dc.description.abstractWe have studied blends of a polymer liquid crystal (PLC) with poly(cyclohexylethyl methacrylate) (PCHEMA) or poly(cyclohexylpropyl methacrylate) (PCHPMA). The PLC is PET/0.6PHB where PET = poly(ethylene terephthalate), PHB = p-hydroxybenzoic acid and 0.6 is the mole fraction of the latter in the copolymer. The microstructure was studied by scanning electron microscopy (SEM). PCHEMA + PLC (20 wt% of the latter, blend E) has a fine texture with LC islands evenly distributed in the matrix and good adhesion between the phases resulting from their partial miscibility. The PCHPMA + PLC (20 wt% of the latter, blend P) shows only limited compatibility. The SEM results are confirmed by values of the glass transition temperatures T-g determined via thermal mechanical analysis. The T-g value of the blend E is shifted towards the T-g of PLC; T-g of blend P is practically equal to that of PCHPMA. The linear isobaric expansivity alpha(L) values for both blends are lower than the respective values for pure PCHPMA and PCHEMA. Thermal stabilities of the blends determined by thermogravimetry are also better than those of pure polymethacrylates. The temperature of 50% weight degradation for blend E is higher than that for pure PCHEMA by more-than 60K (C) 2004 Society of Chemical Industry.
dc.fechaingreso.objetodigital2024-04-11
dc.format.extent5 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1002/pi.1412
dc.identifier.eissn1097-0126
dc.identifier.issn0959-8103
dc.identifier.urihttps://doi.org/10.1002/pi.1412
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76204
dc.identifier.wosidWOS:000220246100015
dc.information.autorucQuímica;Gargallo L;S/I;98194
dc.information.autorucQuímica;Radic D;S/I;49367
dc.issue.numero4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final464
dc.pagina.inicio460
dc.publisherWILEY-BLACKWELL
dc.revistaPOLYMER INTERNATIONAL
dc.rightsacceso restringido
dc.subjectpoly(cyclohexylethyl methacrylate)
dc.subjectpoly(cyclohexylpropyl methacrylate)
dc.subjectpolymer liquid crystals
dc.subjectmorphology
dc.subjectthermal expansivity
dc.subjectpolymer blends
dc.subjectthermal stability
dc.subjectPOLY(CYCLOHEXYLMETHYL METHACRYLATE)
dc.subjectTRIBOLOGICAL PROPERTIES
dc.subjectFLUOROPOLYMER ADDITION
dc.subjectMECHANICAL-PROPERTIES
dc.subjectHYDROXYBENZOIC ACID
dc.subjectRELAXATION
dc.subjectBLENDS
dc.subjectEPOXY
dc.subjectPOLY(ETHYLENE-TEREPHTHALATE)
dc.subjectPOLYCARBONATE
dc.titleMorphology and thermal properties of two polymethacrylates modified by a polymer liquid crystal
dc.typeartículo
dc.volumen53
sipa.codpersvinculados98194
sipa.codpersvinculados49367
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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