A Model for Non-Arrhenius Ionic Conductivity

Non-Arrhenius ionic conductivity is observed in various solid electrolytes. The behavior is intriguing, because it limits the magnitude of ionic conductivity at high temperatures. Understanding the nature of this behavior is of fundamental interest and deserves attention. In the present study, the temperature dependence of the ionic conductivity in solids and liquids is analyzed using the Bond Strength–Coordination Number Fluctuation (BSCNF) model developed by ourselves. It is shown that our model describes well the temperature dependence of ionic conductivity that varies from Arrhenius to non-Arrhenius-type behavior. According to our model, the non-Arrhenius behavior is controlled by the degree of binding energy fluctuation between the mobile species and the surroundings. A brief discussion on a possible size effect in non-Arrhenius behavior is also given. Within the available data, the BSCNF model suggests that the size effect in the degree of the non-Arrhenius mass transport behavior in a poly (methyl ethyl ether)/polystyrene (PVME/PS) blend is different from that in a-polystyrene and polyamide copolymer PA66/6I.

Synthesis and Analysis of Ethylene Glycol Methyl Ethyl Ether

This document explains and demonstrates the problem of HOCH2CH2OCH3, Na and CH3OCH2CH2OC2H5, factors of CH3OCH2CH2OC2H5 a yield influence degree order: reaction temperature>C2H5Br consumption> etherification reaction time, comprehensive single factor experiment and orthogonal experiment results, and concludes that the C2H5Br, sodium metal and CH3OCH2CH2OH is a laboratory CH3OCH2CH2OC2H5 a the best conditions for, C2H5Br : Na (mol ratio) = 1.4, reaction temperature 80 °C, reaction time is 3.5 h.