[EN] The expression of a biparabolic model to represent the dielectric relaxation data of polymers is combined with a statistical method (the LEVM6 program) to provide a reasonable estimation of the parameters of this ...
Canadas, J.C.; Diego, J.A.; Sellares, J.; Mudarra, M.; Belana, J.; Díaz Calleja, Ricardo; Sanchis Sánchez, María Jesús(Elsevier, 2000)
[EN] A comparative study of the relaxational behavior of amorphous and partially crystalline poly(ethylene-2,6-naphthalene dicarboxylate) (PEN), has been carried out by thermally stimulated depolarization currents (TSDC), ...
[EN] Stress-strain relationships for rubbery materials are highly non-linear. In this work, a particular configuration of electroactive material is considered: an isotropic, incompressible electroelastic squared plate is ...
Carsí Rosique, Marta; Sanchis Sánchez, María Jesús; Ortiz Serna, Mª Pilar; Redondo Foj, María Belén; Díaz Calleja, Ricardo; Riande, E.(American Chemical Society, 2013-04-23)
This work is focused on the conductivity study of viscoelastic liquids, taking as a model poly(2,3-dimethoxybenzyl methacrylate). Each isotherm, displaying the conductivity in the frequency domain, shows a plateau in the ...
The objective of this work was to study the influence of small variations in the chemical structure on the molecular dynamics of liquids using as models bis(cyclohexylmethyl) 2-methyl- and dicyclohexyl 2-methylsuccinate. ...
[EN] Dielectric relaxation measurements were carried out on eight chlorinated polyethylene-polypropylene (PEPP) copolymers in the range of temperatures covering the main dielectric absorption. Chlorination of PEPP is ...
[EN] Nanocomposite materials obtained from natural rubber (NR) reinforced with different amounts of cellulose II nanoparticles (in the range of 0 to 30 phr) are studied by dielectric spectroscopy (DS). For comparative ...
Compañ Moreno, Vicente; Sorensen, Torben S.; Díaz Calleja, Ricardo; Riande, E.(American Institute of Physics, 1996)
[EN] The dielectric dispersion measurements of Furukawa et al.(4) are treated in the light of a previously proposed model of Trukhan.(6) The latter describes the influence of mobile ions on the dielectric dispersion in a ...
[EN] Mobility, diffusivity and charge density in polyelectrolytes, are generally determined from electrochemical impedance spectroscopy following the electrode polarization analysis, in which at a given temperature the ...
Carsí Rosique, Marta; Sanchis Sánchez, María Jesús; Díaz Calleja, Ricardo; Riande, Evaristo; Nugent, M. J. D.(American Chemical Society, 2012-04-24)
The dielectric relaxation spectra of poly(2-ethoxyethyl methacrylate) in the frequency domain exhibits above Tg and at high frequencies a well-developed secondary  relaxation. This process is followed in decreasing ...
Carsí Rosique, Marta; Sanchis Sánchez, María Jesús; Díaz Calleja, Ricardo; Riande, E.; Nugent, M. J. D.(Elsevier, 2013-06)
The synthesis, thermal and mechanical characterizations of uncrosslinked and lightly crosslinked poly(2-ethoxyethyl methacrylate) are reported. The uncrosslinked poly(2-ethoxyethyl methacrylate) exhibits in the glassy state ...
[EN] The relation between electric and mechanical properties of dielectric elastomers allows using them as energy convertors under some conditions. The process is based on the relations between mechanical and electrical ...
[EN] The natural rubber specific heat capacity dependence on pressure was estimated on thermodynamic grounds on the basis
of the values empirically determined from differential scanning calorimetry data, (in the temperature ...
García Bernabé, Abel; Lidon-Roger, Jose V.; Sanchis Sánchez, María Jesús; Díaz Calleja, Ricardo; Del Castillo, Luis Felipe(American Physical Society, 2015-10-12)
The dielectric and mechanical spectroscopies of acetate of cis- and trans-2-phenyl-5-hydroxymethyl-1,3- dioxane are reported in the frequency domain from 10−2 to 106 Hz. This ester has been selected in this study ...
Díaz Calleja, Ricardo; Llovera Segovia, Pedro; Riande, Evaristo; Quijano Lopez, Alfredo(American Institute of Physics (AIP), 2013-02)
The effect of combined electromechanic force fields in nematic side chain liquid crystal elastomers will be analyzed. A biaxially stretched plate in the x- and y-directions under an electric field applied in the perpendicular ...
[EN] The relaxation behaviour of coextruded linear low-density polyethylene (LLDPE) films, prepared from copolymers of ethylene-1-octene, is reported. The spectra, expressed in terms of loss tan delta, present a gamma ...
Nikonorova, Natalia A.; Díaz Calleja, Ricardo; Yakimansky, Alexander V.(Wiley, 2011-08)
[EN] The molecular mobility of comb-like copolymers of amyl methacrylate with N-methacryloyl-(4-amino-4'-bromochalcone) with various concentrations (20, 30, 40, 50 and 60 mol%) of chalcone-containing comonomer was studied ...
Carsí Rosique, Marta(Universitat Politècnica de València, 2016-01-07)
[EN] The present work examines the influence of the chemical structure of polymers on thermal, mechanical and dielectric behavior. The experimental techniques used for the purpose are differential scanning calorimetry, ...
A slab of nematic-side-chain-liquid-single-crystal elastomer (NSCLSCE), with the director initially oriented in the z -direction, is subjected to a pair of equal mechanical loads and electrical force fields in the x , y ...