Styrene/Phosphonic Acid Copolymers: Synthesis and Thermal, Mechanical, and Electrochemical Characterization

dc.creatorSantos, LEP
dc.creatorHanamoto, LS
dc.creatorPereira, RP
dc.creatorRocco, AM
dc.creatorFelisberti, MI
dc.date2011
dc.date38353
dc.date2014-07-30T20:06:43Z
dc.date2015-11-26T16:56:21Z
dc.date2014-07-30T20:06:43Z
dc.date2015-11-26T16:56:21Z
dc.date.accessioned2018-03-28T23:43:46Z
dc.date.available2018-03-28T23:43:46Z
dc.identifierJournal Of Applied Polymer Science. Wiley-blackwell, v. 119, n. 1, n. 460, n. 471, 2011.
dc.identifier0021-8995
dc.identifierWOS:000284176000053
dc.identifier10.1002/app.32641
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74632
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74632
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1277355
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionIn this study, a series of poly(styrene-co-vinyl phosphonic acid) [P(S-co-VPA)] copolymers were synthesized by the free-radical copolymerization of styrene and vinyl dimethyl phosphonate followed by alkaline hydrolysis. The P(S-co-VPA) copolymers were characterized by size exclusion chromatography (gel permeation chromatography), Fourier transform infrared vibrational spectroscopy, proton nuclear magnetic resonance, thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, and electrochemical impedance spectroscopy. Despite the difference between the copolymerization ratios of styrene and vinyl dimethyl phosphonate, the resulting copolymers presented single glass transitions at temperatures that depended on the acidic group amount. The glass transition shifted to a higher temperature and became broader as the amount of phosphonic acid increased. The storage modulus at temperatures higher than the glass transition also increased with increasing acidic groups because of intramolecular and intermolecular interactions. All of the acid copolymers were thermally stable to at least 300 degrees C. A high oxidative stability was found for 3 : 1 P(S-co-VPA), which also presented conductivity values on the order of 10(-6) Omega(-1) cm(-1) at room temperature. The 1 : 1 P(S-co-VPA) membrane presented Arrhenius-type behavior at temperatures from 30 to 80 degrees C and conductivity on the order of 10(-5) Omega(-1) cm(-1). (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 460-471, 2011
dc.description119
dc.description1
dc.description460
dc.description471
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundacao ode Amparo a Pesquisa do Estado de Sao Paulo
dc.descriptionFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
dc.descriptionRede de Celulas a Combustivel/Ministerio da Ciencia e Tecnologia
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherWiley-blackwell
dc.publisherMalden
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.subjectcopolymerization
dc.subjectfunctionalization of polymers
dc.subjectmembranes
dc.subjectProton-conducting Polymer
dc.subjectMethanol Fuel-cells
dc.subjectPoly(vinyl Phosphonic Acid)
dc.subjectSol-gel Membranes
dc.subjectElectrolyte Membranes
dc.subjectPhenylvinylphosphonic Acid
dc.subjectIntermediate Temperature
dc.subjectDynamics
dc.subjectNmr
dc.subjectOperation
dc.titleStyrene/Phosphonic Acid Copolymers: Synthesis and Thermal, Mechanical, and Electrochemical Characterization
dc.typeArtículos de revistas


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