Dielectric polarization and the stages of a macromolecule's growth

Article Abstract:

Dielectric relaxation spectra of iglycidyl ether of bisphenol A are studied to examine the change in the orientation polarization, during the growth of a macromolecule by addition reaction in a liquid. During the growth of a macromolecule formed by network polymerization at a fixed temperature, the first inverted sigmoid shape decreases in dielectric permittivity resembling a relaxational feature is caused by a change in the electrode impedance, and not by formation and relaxation of zwitterions.

Methods, Electric properties, Molecular dynamics, Ethers, Ethers (Class of compounds), Polarization (Electricity)

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Structural unfreezing and endothermic effects in liquids, beta-D-fructose

Article Abstract:

The report that the distinction could be made by measuring Cp and the complex heat capacity, Cp, simultaneously in a temperature-modulated scanning mode is presented. The sigmoid-shaped Cp increase observed in normal scanning indicates an endothermic transformation in the beta-D-fructose liquid at T > Tg and not unfreezing of tautomeric transformation on the time scale of heating.

Analysis, Liquids, Fructose, Endothermic reactions

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Structure-dependent DC conductivity and relaxation time in the Debye-Stokes-Einstein equation

Article Abstract:

The studies of structure-dependant dc conductivity of an electrolytic solution which reveal the temperature-dependent deviation from the Debye-Stokes-Einstein (DSE) equation is demonstrated.

Electrical conductivity, Ionic solutions

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