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Study of the Thermal, Dielectric and Mechanical Properties of Poly(Methyl Methacrylate-co-(1,4,7,10-Tetraoxacyclododecan-2-yl)Methyl Methacrylate) Membranes

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Study of the Thermal, Dielectric and Mechanical Properties of Poly(Methyl Methacrylate-co-(1,4,7,10-Tetraoxacyclododecan-2-yl)Methyl Methacrylate) Membranes

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dc.contributor.author Redondo Foj, María Belén es_ES
dc.contributor.author Ortiz Serna, Mª Pilar es_ES
dc.contributor.author Carsí Rosique, Marta es_ES
dc.contributor.author Sanchis Sánchez, María Jesús es_ES
dc.contributor.author Díaz Calleja, Ricardo es_ES
dc.contributor.author García, Félix es_ES
dc.date.accessioned 2016-07-05T11:32:40Z
dc.date.available 2016-07-05T11:32:40Z
dc.date.issued 2012
dc.identifier.issn 1877-7058
dc.identifier.uri http://hdl.handle.net/10251/67118
dc.description.abstract [EN] The synthesis and characterization of new polymeric materials containing crown ethers in their structure is very interesting due to their possibilities of use in many technological applications: metal ion catalysts, ion-exchange membranes, surfactants, etc. The dielectric and mechanical relaxation behavior of two membranes of poly(methyl methacrylate-co-(1,4,7,10-tetraoxacyclododecan-2-yl) methyl methacrylate) (10/90 and 25/75) has been studied. The samples were characterized by using Differential scanning calorimetry (DSC), Broadband Dielectric Spectroscopy (BDS) and Dynamic Mechanical Analysis (DMA). DSC measurements were performed between 203K to 418K, BDS studies were performed in a frequency range of 10-2 Hz to 106 Hz at temperatures ranging from 133 to 443K and DMA measurements were carried at five frequencies (0.3, 1, 3, 10 and 30 Hz) and temperature window 143 to 443K. Both membranes have a similar mechanical spectrum. At 1 Hz and around 413K a Ñ-relaxation process associated with the glass transition temperature can be observed. In decreasing order of temperatures a Ò-relaxation process, probably related with the Ò-relaxation process of the MMA can be observed. This relaxation is intimately overlapped with other non-well defined ×-secondary process. At lower temperatures another Ô-secondary relaxation can be observed. In addition, dielectric spectrum is in good agreement with mechanical spectrum. The Ñ-relaxation process presumably arises from cooperative motions of molecules, whereas internal motions of the backbone in a variety of environments produce the secondary process. However, at low frequencies and high temperatures there is a high contribution of the conductive processes to the dielectric loss. Therefore, in order to establish comparison between mechanical and dielectric spectra were necessary to remove ohmic conduction using Kramers- Kronig equations. All relaxation processes were characterized by using the empirical Havriliak-Negami model. From the Arrhenius plot the activation energies associated with the secondary relaxations have been evaluated. On the other hand, the relaxation associated with the glass transition followed a behavior defined by the Vogel-Fulcher-Tammann-Hesse equation. The barrier associated with the conductivity process was evaluated from the d.c. conductivity evaluated by dielectric measurements es_ES
dc.description.sponsorship This work was financially supported by the DGICYT and CAM through the Grant MAT2008-06725-C03
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation DGICT/MAT2008-06725-C03 es_ES
dc.relation.ispartof Procedia Engineering es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Crown ether es_ES
dc.subject Methacrylates es_ES
dc.subject Relaxations es_ES
dc.subject Conductivity es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.subject.classification TERMODINAMICA APLICADA (UPV) es_ES
dc.title Study of the Thermal, Dielectric and Mechanical Properties of Poly(Methyl Methacrylate-co-(1,4,7,10-Tetraoxacyclododecan-2-yl)Methyl Methacrylate) Membranes es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.proeng.2012.08.856
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Termodinámica Aplicada - Departament de Termodinàmica Aplicada es_ES
dc.description.bibliographicCitation Redondo Foj, MB.; Ortiz Serna, MP.; Carsí Rosique, M.; Sanchis Sánchez, MJ.; Díaz Calleja, R.; García, F. (2012). Study of the Thermal, Dielectric and Mechanical Properties of Poly(Methyl Methacrylate-co-(1,4,7,10-Tetraoxacyclododecan-2-yl)Methyl Methacrylate) Membranes. Procedia Engineering. 44:1534-1538. doi:10.1016/j.proeng.2012.08.856 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.proeng.2012.08.856 es_ES
dc.description.upvformatpinicio 1534 es_ES
dc.description.upvformatpfin 1538 es_ES
dc.type.version info:eu repo/semantics/publishedVersion es_ES
dc.description.volume 44 es_ES
dc.relation.senia 235777 es_ES
dc.contributor.funder Dirección General de Investigación Científica y Técnica
dc.contributor.funder Comunidad de Madrid


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