Mapping phases of poly(vinyl alcohol) and poly(vinyl acetate) blends by FTIR microspectroscopy and optical fluorescence microscopy

dc.creatorDibbern-Brunelli, D
dc.creatorAtvars, TDZ
dc.creatorJoekes, I
dc.creatorBarbosa, VC
dc.date1998
dc.date45839
dc.date2014-12-02T16:30:11Z
dc.date2015-11-26T16:43:55Z
dc.date2014-12-02T16:30:11Z
dc.date2015-11-26T16:43:55Z
dc.date.accessioned2018-03-28T23:29:06Z
dc.date.available2018-03-28T23:29:06Z
dc.identifierJournal Of Applied Polymer Science. John Wiley & Sons Inc, v. 69, n. 4, n. 645, n. 655, 1998.
dc.identifier0021-8995
dc.identifierWOS:000074501000003
dc.identifier10.1002/(SICI)1097-4628(19980725)69:4<645
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53227
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/53227
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53227
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1273748
dc.descriptionFluorescence optical microscopy (FOM) of poly(vinyl alcohol) (PVA) and poly(vinyl acetate) (PVAc) blends in compositions 9/1, 1/1, and 1/9 (w/w) show that these blends present phase separation in the solid state. Each domain of the solid samples was identified by FOM as PVA-richer domains by green fluorescence of fluorescein and PVAc-richer domains by the blue fluorescence of anthracene. The dimensions, shapes, and distributions of these domains were dependent on the initial composition of the polymeric mixtures in the solution. Specific interactions between both homopolymers were studied using FTIR microspectroscopy, which allowed us to obtain spectra for both PVA-richer and PVAc-richer domains. These spectra demonstrated that partial miscibility could occur only for blends with a higher PVAc content and, in these cases, we observed interchain hydrogen-bonded carbonyl groups. Fluorescence microscopy of blends with this partial miscibility exhibited small interconnected domains produced by coalescence of droplets during the polymer phase separation process. (C) 1998 John Wiley & Sons, Inc.
dc.description69
dc.description4
dc.description645
dc.description655
dc.languageen
dc.publisherJohn Wiley & Sons Inc
dc.publisherNew York
dc.publisherEUA
dc.relationJournal Of Applied Polymer Science
dc.relationJ. Appl. Polym. Sci.
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectpolymer blends
dc.subjectfluorescence
dc.subjectmicrospectroscopy
dc.subjectPolymer Blends
dc.subjectInfrared-spectroscopy
dc.titleMapping phases of poly(vinyl alcohol) and poly(vinyl acetate) blends by FTIR microspectroscopy and optical fluorescence microscopy
dc.typeArtículos de revistas


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