Premium
Electrical conduction in (polyvinyl alcohol/glycogen) blend films
Author(s) -
Abd Elkader F.H.,
Gaafer S.A.,
Mahmoud K.H.,
Mohamed S.I.,
Abd Elkader M.F.H.
Publication year - 2009
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20553
Subject(s) - materials science , thermal conduction , space charge , activation energy , composite material , poole–frenkel effect , electrical resistivity and conductivity , charge carrier , polyvinyl alcohol , polymer , conductivity , schottky diode , electrical engineering , optoelectronics , chemistry , organic chemistry , engineering , physics , quantum mechanics , diode , electron
Cast thin films of polyvinyl alcohol/glycogen blends of different compositions have been prepared and subjected to the electrical measurements of both current–time and current–voltage characteristics as well as d.c. conductivity as a function of temperature. The conduction mechanisms operative in the films at different temperature and voltage ranges are estimated from the behavior of log I versus V 1/2 plots. For individual polymers, the conduction mechanism appears to be essentially a Poole–Frenkel type. On blending, at lower temperature the charge conduction is through the Schottky emission while at higher temperature the charge conduction mechanism is Poole–Frenkel. In addition, the deviation of the plots at lower voltages indicates the existence of space charge contribution in conduction mechanism. The obtained results made it possible to determine several conduction parameters including activation energy, carrier mobility, and carrier concentration. POLYM. COMPOS., 2009. © 2008 Society of Plastics Engineers