2 research outputs found
Ordering of droplets and light scattering in polymer dispersed liquid crystal films
We study the effects of droplet ordering in initial optical transmittance
through polymer dispersed liquid crystal (PDLC) films prepared in the presence
of an electrical field. The experimental data are interpreted by using a
theoretical approach to light scattering in PDLC films that explicitly relates
optical transmittance and the order parameters characterizing both the
orientational structures inside bipolar droplets and orientational distribution
of the droplets. The theory relies on the Rayleigh-Gans approximation and uses
the Percus-Yevick approximation to take into account the effects due to droplet
positional correlations.Comment: revtex4, 18 pages, 8 figure
On micro-structural effects in dielectric mixtures
The paper presents numerical simulations performed on dielectric properties
of two-dimensional binary composites on eleven regular space filling
tessellations. First, significant contributions of different parameters, which
play an important role in the electrical properties of the composite, are
introduced both for designing and analyzing material mixtures. Later, influence
of structural differences and intrinsic electrical properties of constituents
on the composite's over all electrical properties are investigated. The
structural differences are resolved by the spectral density representation
approach. The numerical technique, without any {\em a-priori} assumptions, for
extracting the spectral density function is also presented.Comment: 24 pages, 8 figure and 7 tables. It is submitted to IEEE Transactions
on Dielectrics and Electrical Insulatio