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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.typeArtigo de periódicopt_BR
dc.titleInteraction Of Ethylene Oxide-propylene Oxide Copolymers With Ionic Surfactants Studied By Calorimetry: Random Versus Block Copolymers.pt_BR
dc.contributor.authorNiemiec, Annapt_BR
dc.contributor.authorLoh, Watsonpt_BR
unicamp.authorAnna Niemiec, Institute of Chemistry, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970, Campinas, SP, Brazil.pt_BR
unicamp.author.externalWatson Loh,pt
dc.subjectAlgorithmspt_BR
dc.subjectCalorimetrypt_BR
dc.subjectEpoxy Compoundspt_BR
dc.subjectEthylene Oxidept_BR
dc.subjectHydrophobic And Hydrophilic Interactionspt_BR
dc.subjectIonspt_BR
dc.subjectPolyethylenespt_BR
dc.subjectPolypropylenespt_BR
dc.subjectSodium Dodecyl Sulfatept_BR
dc.subjectSurface Propertiespt_BR
dc.subjectSurface-active Agentspt_BR
dc.description.abstractThe present study used calorimetric techniques to follow the interaction of random and block ethylene oxide (EO)-propylene oxide (PO) copolymers with ionic surfactants. Features such as the intensity of the interaction (evaluated through their critical aggregation concentrations) and the profile of the isothermal titration calorimetry (ITC) curves were comparatively analyzed for random and block copolymers with similar composition (number of EO and PO units). Random copolymers displayed an interaction similar to that observed with other hydrophilic homopolymers with the additional characteristic that the intensity of the interaction increased with the increase in the copolymer hydrophobicity (as determined by its PO content), revealing that these copolymers display an intermediate behavior between PEO and PPO. For nonaggregated block copolymers (unimers) with large enough EO blocks (molar mass above 2000 g mol-1), ITC curves revealed that the anionic surfactant sodium dodecylsulfate (SDS) interacts with the PO and EO blocks almost independently, being more favorable with the PO block, which controls the critical aggregation concentration (cac) value. Effects of temperature and of the nature of the ionic surfactants on their interaction with these copolymers were found to agree with the previously reported trends.en
dc.relation.ispartofThe Journal Of Physical Chemistry. Bpt_BR
dc.relation.ispartofabbreviationJ Phys Chem Bpt_BR
dc.date.issued2008-Janpt_BR
dc.identifier.citationThe Journal Of Physical Chemistry. B. v. 112, n. 3, p. 727-33, 2008-Jan.pt_BR
dc.language.isoengpt_BR
dc.description.volume112pt_BR
dc.description.firstpage727-33pt_BR
dc.rightsfechadopt_BR
dc.sourcePubMedpt_BR
dc.identifier.issn1520-6106pt_BR
dc.identifier.doi10.1021/jp0761362pt_BR
dc.identifier.urlhttp://www.ncbi.nlm.nih.gov/pubmed/18081338pt_BR
dc.date.available2015-11-27T13:13:32Z-
dc.date.accessioned2015-11-27T13:13:32Z-
dc.description.provenanceMade available in DSpace on 2015-11-27T13:13:32Z (GMT). No. of bitstreams: 1 pmed_18081338.pdf: 113111 bytes, checksum: 0ac827518509871947af910179658474 (MD5) Previous issue date: 2008en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/198140-
dc.identifier.idPubmed18081338pt_BR
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