Authors:M. Matthews, I. Atkinson, Lubaina Presswala, O. Najjar, Nadine Gerhardstein, R. Wei, Elizabeth Rye, and A. Riga
Dielectric analysis (DEA), supported by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), powder X-ray
diffraction analysis (PXRD) and photomicrography, reveal the chiral difference in the amino acids. The acids are classified
as dielectric materials based on their structure, relating chirality to the vector sum of the average dipole moment, composed
of the constant optical (electronic) and infra-red (atomic) polarizabilities, as well as dipole orientation. This study encompasses
14 L-and D-amino acid isomers. Physical properties recorded include AC electrical conductivity, charge transfer complexes, melting,
recrystallization, amorphous and crystalline phases, and relaxation spectra, activation energies and polarization times for
the electrical charging process.
Authors:R. H. Fattepur, K. H. Fattepur, and N. H. Ayachit
regarding the structure of the molecule and the process of dipoleorientation. These studies also give an idea about inter- and intra-molecular forces. Further, they enable one to calculate thermodynamic parameters, such as change in activation energy for
Authors:Mohan T. Hosamani, Narasimha H. Ayachit, and D. K. Deshpande
to calculate thermodynamic parameters such as change in activation energy for dipoleorientation Δ G* , enthalpy Δ H* , entropy of activation Δ S* , and the other temperature dependent parameters such as relaxation time τ , the distribution parameter
Functional parameters contributing to the recognizable good performance of a highly crosslinked olefinic polymer based on
cyclopentadiene have been evaluated by a limited range of stress decay and creep recovery from a fixed deformation over constant
time periods. The experimental design for these involved a calculated stress (load) at the initial sample deformation (displacement)
for determination of changes in stress in bending mode and flex creep under applied load at three constant temperature segments
of 6 h each with 20 min recovery time between segments. The results have identified a behavior which is typical of interfacial
orientational effect in a two-component system. Thermal conductivity, heat capacity and density at the same temperatures were
measured for determination of variations in thermal diffusivity as an indication of the competing effects of densification
and thermal expansion for such a system.
Static charging and polarization experiments were performed for evaluation of other desired uses of this material, in moving
parts and in direct or induced voltage applications. The latter allows measurement of dynamic charge transport through the
resin matrix. Calculations indicate generation of charge carriers from weak secondary bonding typical of polymer interlaces.
The polarization itself consists of dipole orientation characterized by relatively high activation energy.
The intrinsic mechanical properties for this material had been determined by the manufacturer, but the performance parameters
reported in this study have been determined for the first time for exploration of further uses for this material.
. The charges become polarized to compensate for the electric field such that the positive and negative charges move in opposite directions. At the microscopic level, several dielectric mechanisms can contribute to dielectric behavior. Dipoleorientation
Frohlich model itself. Considering the complex nature of the amorphous phase with multiple states of aggregation, any computational description of TSPC experiments would have to account for both a random distribution of dipoleorientations as well as