PMMA based Polymer Gel Electrolytes have been prepared with different concentrations of salt (NaI) by gelation method. This study has been carried out to understand the effect of salt concentration on conductivity of polymer gel electrolyte. The prepared samples are characterized by XRD, optical microscopy, FTIR and Dielectric spectroscopy. The XRD studies revealed that the prepared polymer gel...

The purpose of this study was to evaluate dependence of MAGICA polymer gel dosimeter 1/T2 on different electron energies as well as on different mean dose rates for a standard clinically used Linear accelerator. A calibration curve (in the linear region) based on 12 dosimeters (11 irradiated and one background) was obtained for 6MeV electron beam. Dose rate of dependence was studied in 10MeV el...

This paper proposes a model for predicting dynamic motions of elastic robots made entirely of electro-active polymer gel. The requirement is that both active and passive deformations be described simultaneously. Active deformations arise from generated stress, while passive deformations are due to external forces, such as gravity and friction. We represent both in the same framework, considerin...

We report the efficient poling of an electro-optic (EO) polymer in a hybrid TiO(2)/electro-optic polymer multilayer waveguide modulator on mesoporous sol-gel silica cladding. The mesoporous sol-gel silica has nanometer-sized pores and a low refractive index of 1.24, which improves mode confinement in the 400-nm-thick EO polymer film in the modulators and prevents optical absorption from the low...

A set of equilibrium equations for a biphasic polymer gel are considered with the end purpose of studying stress and deformation in confinement problems encountered in connection with biomedical implants. The existence of minimizers for the gel energy is established first. Further, the small-strain equations are derived and related to the linear elasticity equations with parameters dependent on...

A new theory for polymer gels is developed on the basis of the single-chain mean-field (SCMF) theory. This theory takes the mesh chain or the star polymer as the characteristic unit of polymer gels, and it allows the study of chain conformation properties for gels in their different states. The preparation condition effect is conveniently described by the current theory, and the gels with compl...

Repetitive abrupt structural changes can be produced in a small piece of cross-linked polyacrylate hydrogel by exchanging the divalent counter-ions in the superficial gel layer to monovalent cations. The temporal variations of the hydrostatic pressure, electric impedance and potential associated with these structural changes frequently show striking resemblance to those encountered during repet...

In the field of polymer science, many kinds of polymeric material systems that show a sol-gel transition have been created. However, most systems are unidirectional stimuli-responsive systems that require physical signals such as a change in temperature. Here, we report on the design of a block copolymer solution that undergoes autonomous and periodic sol-gel transition under constant condition...

polymer gel dosimeter is the only accurate three dimensional (3d) dosimeter that can measure the absorbed dose distribution in a perfect 3d setting. gel dosimetry by using optical computed tomography (oct) has been promoted by several researches. in the current study, we designed and constructed a prototype oct system for gel dosimetry. first, the electrical system for optical scanning of the g...