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A simple model for cooperative and non-exponential processes in non-crystalline polymers

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A simple model for cooperative and non-exponential processes in non-crystalline polymers

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dc.contributor.author Torregrosa Cabanilles, Constantino es_ES
dc.contributor.author Molina Mateo, José es_ES
dc.contributor.author Meseguer Dueñas, José María es_ES
dc.contributor.author Gómez Ribelles, José Luís es_ES
dc.date.accessioned 2014-02-25T16:12:32Z
dc.date.issued 2011-01-15
dc.identifier.issn 0022-3093
dc.identifier.uri http://hdl.handle.net/10251/35966
dc.description.abstract A quite simple Markov chain model is presented in an attempt to understand several characteristic properties of the structural relaxation in glass-former materials. A second order Markov model is proposed for a small region of the material. Only a few parameters are necessary for the definition of the material in the model equations namely the energy levels accessible to that small region and the transition probabilities between them. The later are considered dependent on the energy levels and the potential barrier heights between them, on temperature, on a reference transition rate parameter and on a cooperativity or memory parameter related to the interaction with the neighbour regions. Isothermal relaxations at different temperatures were simulated with selected values of the model parameters. As a result, non-exponentiality of energy relaxations and its temperature dependence appears directly related to the cooperativity parameter. Markov chain model shows also non-linearity and memory effects, and a transition between two different regimes in the dependence of the relaxation times with temperature. © 2010 Elsevier B.V.All rights reserved. es_ES
dc.description.sponsorship The authors would like to acknowledge the support provided by the Vicerectorado de Investigacion, Desarrollo e Innovacion of the Universitat Politecnica de Valencia through the PAID07-20080021 project and by the Conselleria d'Educacio de la Generalitat Valenciana through the GV/2009/033 project. en_EN
dc.format.extent 4 es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Vicerectorado de Investigacion es_ES
dc.relation Desarrollo e Innovacion of the Universitat Politecnica de Valencia [PAID07-20080021] es_ES
dc.relation Conselleria d'Educacio de la Generalitat Valenciana [GV/2009/033] es_ES
dc.relation.ispartof Journal of Non-Crystalline Solids es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Glass transition es_ES
dc.subject Markov chain es_ES
dc.subject Structural relaxation es_ES
dc.subject Characteristic properties es_ES
dc.subject Cooperativity es_ES
dc.subject Energy level es_ES
dc.subject Energy relaxation es_ES
dc.subject Exponential process es_ES
dc.subject Isothermal relaxation es_ES
dc.subject Markov chain models es_ES
dc.subject Memory effects es_ES
dc.subject Memory parameters es_ES
dc.subject Model equations es_ES
dc.subject Model parameters es_ES
dc.subject Non-crystalline polymers es_ES
dc.subject Non-Linearity es_ES
dc.subject Potential barrier height es_ES
dc.subject Second-order Markov model es_ES
dc.subject Small region es_ES
dc.subject Temperature dependence es_ES
dc.subject Transition probabilities es_ES
dc.subject Transition rates es_ES
dc.subject Computer simulation es_ES
dc.subject Glass es_ES
dc.subject Markov processes es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title A simple model for cooperative and non-exponential processes in non-crystalline polymers es_ES
dc.type Artículo es_ES
dc.embargo.lift 10000-01-01
dc.embargo.terms forever es_ES
dc.identifier.doi 10.1016/j.jnoncrysol.2010.06.040
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Termodinámica Aplicada - Departament de Termodinàmica Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Centro de Biomateriales e Ingeniería Tisular - Centre de Biomaterials i Enginyeria Tissular es_ES
dc.description.bibliographicCitation Torregrosa Cabanilles, C.; Molina Mateo, J.; Meseguer Dueñas, JM.; Gómez Ribelles, JL. (2011). A simple model for cooperative and non-exponential processes in non-crystalline polymers. Journal of Non-Crystalline Solids. 357(2):367-370. doi:10.1016/j.jnoncrysol.2010.06.040 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.jnoncrysol.2010.06.040 es_ES
dc.description.upvformatpinicio 367 es_ES
dc.description.upvformatpfin 370 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 357 es_ES
dc.description.issue 2 es_ES
dc.relation.senia 204355
dc.identifier.eissn 1873-4812


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