Copolymer formation through ultrasonic and viscosity measurements

984-986Ultrasonic velocity (U), viscosity (η), adiabatic compressibility (βa) and viscous relaxation time (τ) have been measured in binary mixtures of polyvinyl chloride (PVC) and polyvinyl acetate (PVAc) in tetrahydrofuran (THF) at different temperatures 298, 303, 308, 313 and 318K at frequency 2 MHz. The observed maxima in ultrasonic velocity, viscosity, relaxation time and minima in adiabatic compressibility are attributed to molecular interactions between PVC and PVAc due to proton donor-acceptor interactions

Study of electrical conduction mechanism of succinic acid doped glycine pellet

The electrical conductivity of succinic acid doped glycine pellet has been measured by studying the I-V characteristics at various temperatures in the range 313K-353K. The results are presented in the form of I-V characteristics and analysis has been made by interpretation of Poole- Frenkel, Fowler- Nordheim, Schottky, log(J) versus T plots, Richardson and Arrehenius plots. It is observed that the conduction mechanism in the present case is a cooperative process, with Poole-Frankel type in low field range and Fowler-Nordheim mechanism in high field range.Author Affiliation: D K Burghate, S H Deshmukh, V P Akhare, Laxmi Joshi and V S Deogaonkar 1.P. G. Department of Physics, Shri Shivaji Science College, Amravati-444603, Maharashtra, India E-mail [email protected] P T Deshmukh Dr. Panjabrao Deshmukh Polytechnic, Amravati-444 603, Maharashtra, IndiaP. G. Department of Physics, Shri Shivaji Science College, Amravati-444603, Maharashtra, India P T Deshmukh Dr. Panjabrao Deshmukh Polytechnic, Amravati-444 603, Maharashtra, Indi

<span style="font-size:11.0pt;line-height:115%; font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family: "Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font: minor-latin;mso-bidi-font-family:Arial;mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">Effect of pellet pressing temperature on transport properties of amorphous CuO-Bi₂O₃ pellets</span>

231-235<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">The results of transport properties of CuO-Bi2O3 pellets pressed at different temperatures are reported. The data of electrical properties such as dc-electrical conductivity, dielectric constant and activation energy are discussed. Similarities between CuO-Bi2O3 pellets and oxide glasses are emphasized. New results of pellet pressing temperature are reported. The hopping conduction phenomenon in three sets of pellets is discussed. All the three pellets exhibited non-adiabatic electronic conduction. The results of dc-conductivity are discussed on the basis of growing of small crystallities in the pellets.</span

Hopping Conduction Mechanism in Amorphous CuO-Bi2\text{}_{2}O3\text{}_{3} Pellets

The transport properties of CuO-Bi$\text{}_{2}$O$\text{}_{3}$ pellets (pressed at room temperature 303 K) like dc electrical conductivity etc. are measured. The activation energy, dielectric constant etc. are reported. The hopping conduction is examined. Non-adiabatic hopping conduction is observed. The plot of -log σ versus 1/T is found to be linear. Activation energy of pellets containing CuO (80, 70, 60 mol%) shows electronic conduction while the pellet containing CuO (50 mol%) shows ionic conduction. The effect of content of CuO (mol%) and frequency on dielectric constant is also studied. The variation of dielectric constant with CuO (mol%) shows zigzag nature and may be due to the relaxation effects

Electrical conduction of succinic acid doped glycine pellet

533-538The electrical conduction of succinic acid doped glycine pellet has been measured by studying the I-V characteristics at various temperatures in the range 313-353 K. The results are presented in the form of I-V characteristics, and analysis has been made in the light of Poole-Frenkel, Fowler-Nordheim, Schottky, log(J) versus T plots, Richardson and Arrehenius plots. Results analysed suggest that, Schottky-Richardson mechanism is primarily responsible for observed conduction