MSA  Vol.2 No.8 , August 2011
Short Circuit Thermally Stimulated Discharge Current Measurement on PMMA:PEMA:PVDF Ternary Blends
ABSTRACT
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.

Cite this paper
nullA. Gupta, A. Tiwari, R. Bajpai and J. Keller, "Short Circuit Thermally Stimulated Discharge Current Measurement on PMMA:PEMA:PVDF Ternary Blends," Materials Sciences and Applications, Vol. 2 No. 8, 2011, pp. 1041-1048. doi: 10.4236/msa.2011.28141.
References
[1]   T. Fahmy and M. T. Ahmed, “Thermal Induced Structural Change Investigations in PVC/PEMA Polymer Blend,” Polymer Testing, Vol. 20, No. 5, 2001, pp. 477-484. doi:org/10.1016/S0142-9418(00)00060-X

[2]   J. Vanderschueren and J. Gasiot, “Topics in Applied Physics: Thermally Stimulated Relaxations in Solids,” Springer Verlag, Berlin, 1979.

[3]   C. Viorel, M. M. Doina, R. Constantin, I. Monica, M. Yann and D. Florea, “Mesomorphic Behaviour and TSDC Measurements of Ortho-Metallated Palladium(Ii) and Platinum(Ii) Complexes with S,O-Donor Co-Ligands,” Liquid Crystals, Vol. 36, No. 9, 2009, pp. 123-132. doi:org/10.1080/02678290802696173

[4]   S. Classen, M. Vogt and J. H. Wendorff, “Phase Behaviour and Structure Formation in Ternary Blends: Studies on Blends of PVDF/ PMMA/ PVAC,” Polymer Advance Technology, Vol. 6, 2003, pp. 616-625. doi:org/10.1002/pat.1995.220060905

[5]   D. H. F. Kanda, H. N. Nagashima, J. A. Malmonge, W. K. Sakamoto and G. O. Chierice, “Effect of Polyol Excess on the Electrical Property of Vegetable-Polyurethane Film,” Journal Material Science, Vol. 43, 2008, pp. 5436-5440. doi:org/10.1007/s10853-008-2843-3

[6]   T. Hirayama, A. T. Takahashi and K. Koyama, “Thermally Stimulated Current Measurements for a Blend of Poly (Vinylidene Fluoride-Triflouroethiene) Copolymer and Poly (Methyl Methacrylate),” Japan Journal Polymer Science Technology, Vol. 61, 2004, pp. 335-340.

[7]   M. T. Ahmed, “Thermally Stimulated Discharge Current and Thermal Sampling Studies on Poly (Vinyl Chloride-Co-Vinylacetate-Co-2-Hydroxypropylacrylate)/Poly (Methyl Methacrylate) Blends,” International Journal of Materials Sciences, Vol. 4, 2009, pp. 12-18.

[8]   P. Saxena, P, M. S. Gaur and P. K. Khare, “Effect of Blending with Polysulfone on Thermally Stimulated Discharge Behavior of Polyvinylidenefluoride Films,” Engineering, Vol. 48, 2009, pp. 415-422.

[9]   Y. Yin, Z. Li, X. Li and P. Jiang, “Thermally Stimulated Currents of SiO2/Low-Density Polyethylene,” Micro- and Nanocomposite, Vol. 5, 2010, pp. 385-390.

[10]   T. Mitra, J. M. Keller and R. B. Bajpai, “Thermally Stimulated Depolarization Current Investigation of Poly (Phenylene Oxide): Poly (Styrene) Polymer Blends,” Indian Journal Physics, Vol. 79, 2005, pp. 361-366.

[11]   V. S. Sangawar, R. J. Dhokne, A. U. Ubale, P. S. Chikhalikar and S. D. Meshram, “Structural Characterization and Thermally Stimulated Discharge Conductivity (Tsdc) Study in Polymer Thin Films,” Bulletin Material Science, Vol. 30, No. 2, 2007, pp. 163-166. doi:org/10.1007/s12034-007-0029-2

[12]   R. A. Singh, R. K. Gupta and S. K. Singh, “Preparation and Characterization of Polymer Composite Based on Charge Transfer Complex of Phenothiazine-Iodine in Polystyrene,” Bulletin Material Science, Vol. 28, No. 5, 2005, pp. 423-429. doi:org/10.1007/BF02711231

[13]   A. Tiwari, A. K. Gupta, R. Bajpai and J. M. Keller, “Structural and Mechanical Study of In-Situ Generated Poly (Methylmethacrylate) (PMMA), Poly (Ethlymathacrylate) (PEMA) and Poly (Vinlylidenefluoride) (PVDF) Ternary Films,” Polymer Plastic Technology Engineering, Vol. 49, 2010, pp. 573-580. doi:org/10.1080/03602551003652722

[14]   A. N. Gubkin, “Electrets,” Academy of Sciences, Moscow, 1961.

[15]   M. M. Perlman and S. Unger, “TSC Study of Traps in Electron-Irradiated Teflon and Polyethylene,” Journal Physics D Applied Physics,” Vol. 5, No. 11, 1972, pp. 2115-2119. doi:org/10.1088/0022-3727/5/11/319

[16]   T. Heijiboer, “Mechanical properties and Molecular Structure in Physics of Non Crystalline Solids,” North Holand Publisher, Amsterdam, 1965.

[17]   J. M. Reboul, “Simultaneous Space Charge and TSDC Measurements on Polarized,” Polyme, Vol. 13, 2006, pp. 1016-1022.

[18]   C. Choure, J. M. Keller and R. Bajpai, “Thermally Stimulated Depolarization Current Behavior of Polyethylene/Polyvinlylacetate Blends Effect of Blending,” Journal Applied Polymer Science, Vol. 101, 2006, pp. 3040- 3045. doi:org/10.1002/app.23849

[19]   V. Turnhout, “Thermally Stimulated Discharge of Polymer Electrets,” Elsevier, Amsterdam, 1975.

[20]   N. G. Mccrum, R. E. Read and G. Williams, “An Electric and Dielectric Effects in Polymeric Solids,” Wiley, New York, 1967.

[21]   V. V. R. R. Narasimha and A. Kalpalatha, “Thermally Stimulated Discharge Currents in Polyvinyl Pyrrolidone Polymer Films,” Material Chemistry Physics, Vol. 17, No. 4, 1987, pp. 317-324. doi:org/10.1016/0254-0584(87)90084-8

[22]   M. Madani, N. A. Maziad and R. M. Khafagy, “Thermally Stimulated Depolarization Current and Thermal Analysis Studies of Gamma Irradiated Lithium-Salt/Poly- mer Electrolyte Blends,” Journal Macromolecular Science B, Vol. 46, No. 6, 2007, pp. 1191-1203. UUdoi:org/10.1080/00222340701629224

[23]   R. A. Creswell, M. M. Perlman and M. A. Kabayama, “Dielectric Properties of Solids,” Plenum, New York, 1972.

[24]   A. J. Lovinger, “Development in Crystalline Polymers-1,” Applied Science, London, 1982.

[25]   M. Borisova, O. Galukov and A. Kanapitsas, “Polarization Phenomena in Blends of Polyurethane and Styrene-Acrylonitrile,” Electrets, ISE 10 Proceedings, 1999, pp. 573-576.

 
 
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