Open AccessShort Circuit Thermally Stimulated Discharge Current Measurement on PMMA:PEMA:PVDF Ternary Blends
Author(s) -
Anand Gupta,
Atul Tiwari,
R. Bajpai,
J. M. Keller
Publication year - 2011
Publication title -
materials sciences and applications
Language(s) - English
Resource type - Journals
eISSN - 2153-1188
pISSN - 2153-117X
DOI - 10.4236/msa.2011.28141
Subject(s) - materials science , ternary operation , dielectric , ohmic contact , polymer blend , polymer , current (fluid) , ternary numeral system , conductivity , composite material , analytical chemistry (journal) , chemical engineering , thermodynamics , optoelectronics , chemistry , copolymer , organic chemistry , physics , layer (electronics) , computer science , engineering , programming language
The attainment of a better understanding and improvement of electrical properties of ternary blend is a task of particular scientific and economic importance. Ternary films of Poly (methylmethacrylate), Poly (ethlymathacrylate) and poly (vinlylidenefluoride) were prepared using solution cast technique. Thereafter, to study the hetro charges, homo-charges and interfacial charge formation in ternary system, the short circuit thermally stimulated discharge current (SC-TSDC) measurements were carried out on bilaterally metallized electrets. The ternary blend samples taken for the present investigations are hetrogeneous system involving three polymers differing in their conduction behaviour and dielectric property. Thus, unequal ohmic conduction currents arriving at the interface are expected to result in accumulation of charges at the interface or the Maxwell-Wagner effect. Clearly the Maxwell Wagner effect is expected to contribute discernibly to the observed TSDC’s of the ternary blends.The PMMA: PEMA: PVDF:: 100:100:50 blend exhibits highest tendency while 100:50:100 the least, towards the anomalous current flow. Moreover, the conductivity of 100: 100: 50 is found to be more and, therefore, a large amount of homocharge is injected leading to anomalous current