Dynamic and static fluorescence spectroscopy applied to miscibility of poly(n-butyl methacrylate-co-styrene) with polystyrene and morphological analysis by epifluorescence microscopy

dc.creatorde Andrade, ML
dc.creatorAtvars, TDZ
dc.date2004
dc.dateAPR 1
dc.date2014-11-16T02:29:13Z
dc.date2015-11-26T16:31:23Z
dc.date2014-11-16T02:29:13Z
dc.date2015-11-26T16:31:23Z
dc.date.accessioned2018-03-28T23:12:25Z
dc.date.available2018-03-28T23:12:25Z
dc.identifierJournal Of Physical Chemistry B. Amer Chemical Soc, v. 108, n. 13, n. 3975, n. 3984, 2004.
dc.identifier1520-6106
dc.identifierWOS:000220524500006
dc.identifier10.1021/jp034664h
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63563
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/63563
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63563
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1270192
dc.descriptionThe microphase structure in blends of poly(n-butyl methacrylate-co-styrene) (nBMAS) and polystyrene (PS) was investigated by nonradiative energy transfer (NRET) using both steady-state fluorescence and time correlated single-photon counting (TCSPC) measurements. The nBMAS was labeled with anthryl groups by semicontinuous emulsion copolymerization. Studies of the morphology and phase separation of these blends performed by epifluorescence microscopy were complemented by differential scanning calorimetry. Miscibility of polymers with several compositions, from 5 to 95% w/w, was studied. For compositions with PS < 80 wt % we obtained a partial miscibility with discrete domains of PS dispersed in a nBMAS matrix. Blends up to PS = 20 wt % presented a co-continuous morphology whereas a bicontinuous morphology was generated for lower PS content. Fluorescence lifetimes and the lifetime distribution were consistently associated with the microheterogeneity of the material and were considered an additional criterion for the analysis of miscibility.
dc.description108
dc.description13
dc.description3975
dc.description3984
dc.languageen
dc.publisherAmer Chemical Soc
dc.publisherWashington
dc.publisherEUA
dc.relationJournal Of Physical Chemistry B
dc.relationJ. Phys. Chem. B
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectNonradiative Energy-transfer
dc.subjectIntramolecular Excimer Formation
dc.subjectPolymer Blend Miscibility
dc.subjectPoly(methyl Methacrylate)
dc.subjectMethyl-methacrylate
dc.subjectAromatic Polymers
dc.subjectPhase-separation
dc.subjectMolecular-weight
dc.subjectCopolymers
dc.subjectProbe
dc.titleDynamic and static fluorescence spectroscopy applied to miscibility of poly(n-butyl methacrylate-co-styrene) with polystyrene and morphological analysis by epifluorescence microscopy
dc.typeArtículos de revistas


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