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dc.contributor.author Cassano, Guillermo A.
dc.contributor.author Valles, Enrique Marcelo
dc.contributor.author Quinzani, Lidia Maria
dc.date.available 2018-03-02T15:14:21Z
dc.date.issued 2000-01
dc.identifier.citation Cassano, Guillermo A.; Valles, Enrique Marcelo; Quinzani, Lidia Maria; Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene; Journal Rheology Amer Inst Physics; Journal of Rheology; 44; 1; 1-2000; 47-63
dc.identifier.issn 0148-6055
dc.identifier.uri http://hdl.handle.net/11336/37651
dc.description.abstract The linear viscoelastic behavior of a series of partially hydrogenated polybutadienes (PHPB) obtained by catalytic hydrogenation of an almost monodisperse polybutadiene (PB) was studied experimentally at temperatures above 110°C. The molecular characterization of the polymers used in this study showed that the catalytic hydrogenation of PB produces materials with a bimodal distribution of polymer species for global conversions lower than approximately 90%. All the PHPBs, even the less hydrogenated, are a mixture of a highly hydrogenated PB (with approximately 89% saturation) and unreacted PB. The rheological behavior of the fluids was studied measuring the elastic and viscous moduli at different temperatures in small-amplitude oscillatory shear flow. The two-phase polymer blends show thermorheological complex behavior and an increase in elasticity at low frequencies which may be associated with long relaxation time processes. The dynamic moduli of the pure components in the terminal region is modeled using a single relaxation time while the blends are described by a minimum of three relaxation modes. The two smaller relaxation times correspond to the relaxation of the blend components while the largest comes from the geometric relaxation of the shape of the interface. The zero-shear-rate viscosity of the PHPBs shows a positive deviation relative to log-additivity rule. But, when the predicted contribution of the interface is subtracted, the resulting zero-shear-rate viscosity as a function of the concentration follows this rule. © 2000 The Society of Rheology.
dc.format application/pdf
dc.language.iso eng
dc.publisher Journal Rheology Amer Inst Physics
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject POLYBUTADIENE
dc.subject HYDROGENATION
dc.subject LINEAR VISCOELASTICITY
dc.subject BLENDS
dc.subject.classification Recubrimientos y Películas
dc.subject.classification Ingeniería de los Materiales
dc.subject.classification INGENIERÍAS Y TECNOLOGÍAS
dc.title Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-11-24T13:56:58Z
dc.journal.volume 44
dc.journal.number 1
dc.journal.pagination 47-63
dc.journal.pais Estados Unidos
dc.journal.ciudad Nueva York
dc.description.fil Fil: Cassano, Guillermo A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.description.fil Fil: Valles, Enrique Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.description.fil Fil: Quinzani, Lidia Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
dc.journal.title Journal of Rheology
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1122/1.551077
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://sor.scitation.org/doi/abs/10.1122/1.551077


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)