11 citations · 57 across the 12 of their papers we have counts for
12 papers
On the emergence of molecular tilt in a ferroelectric smectic liquid crystal with broken director-inversion symmetry
Aitor Erkoreka, Mauricio Vera-Arévalo, Alberto Concellón +5
The origin of some mesophases of the ferroelectric nematic realm is not yet well understood. In this work we study the highly polar liquid crystal MIO, a close structural analogue…
Double glass transition in polyethylene naphthalate structural relaxation by MDSC, BDS and TSDC
J. C. Cañadas, J. A. Diego, S. Diez-Berart +4
In this work, we present an experimental study of the primary and secondary relaxations of the semi-crystalline polymer polyethylene naphthalate (PEN), by Modulated Differential Sc…
Comparison of pulsed electroacoustic and thermally stimulated depolarization current measurements of thermally poled PET electrets
S. E. Parsa, J. C. Cañadas, J. A. Diego +2
We have compared measurements of a set of polyethylene terephthalate (PET) electret samples by means of pulsed electroacoustic method (PEA) and thermally stimulated depolarization…
Effects of UV radiation on the charge trapping capability of PET
J. C. Cañadas, J. A. Diego, M. Mudarra +2
Poly(ethylene terephthalate) (PET), as most dielectric materials, is able to retain space charge in traps. This allows the material to attain an almost-permanent polarization when…
Study of the charge profile of thermally poled electrets
S. E. Parsa, J. Trull, X. Colom +1
The charge profile of thermally poled electrets has been studied using two different methods, laser induced pressure pulse (LIPP) and pulsed electroacoustic (PEA), to gain insight…
Sublinear dispersive conductivity in polyetherimides by the electric modulus formalism
M. Mudarra, J. Sellares, J. C. Canadas +1
It can be seen by Dynamic Electrical Analysis that the electrical properties of polyetherimide at temperatures above the glass transition are strongly influenced by space charge. W…
Dielectric study of the glass transition of PET/PEN blends
J. Sellares, J. A. Diego, J. C. Canadas +5
An analysis of the glass transition of four materials with similar chemical structures is performed: PET, PEN and two PET/PEN blends (90/10 and 70/30 w/w). During the melt processi…
Identification of dipolar relaxations in dielectric spectra of mid--voltage cross--linked polyethylene cables
J. Orrit, J. C. Canadas, J. Sellares +1
Medium-voltage cross-linked polyethylene (MV-XLPE) cables have an important role in the electrical power distribution system. For this reason, the study of XLPE insulation is cruci…
Study of the glass transition in the amorphous interlamellar phase of highly crystallized poly(ethylene terephthalate)
J. Sellares, J. A. Diego, J. Belana
Poly(ethylene terephthalate) (PET) is a semi--crystalline polymer that can be crystallized to different degrees heating from the amorphous state. Even when primary crystallization…
Dielectric study of the glass transition: correlation with calorimetric data
J. A. Diego, J. Sellares, A. Aragoneses +3
The glass transition in amorphous poly(ethylene terephthalate) is studied by thermally stimulated depolarization currents (TSDC) and differential scanning calorimetry (DSC). The ab…
Application of the Tool--Narayanaswamy--Moynihan model to the study of the alpha relaxation by thermally stimulated depolarization currents
J. Sellares, J. C. Canadas, J. A. Diego +2
The dielectric alpha relaxation is the dielectric manifestation of the glass transition. In spite of this fact, the more commonly used models, the Arrhenius model and the Williams-…
Plasmons in simple-metal slabs: a semiclassical approach
S. Leseduarte, J. Sellares, A. Travesset
Collective excitations in simple metal systems can be described successfully in terms of a local one-body excitation operator Q, due to the long range nature of the coulomb interac…