Authors

1 Department of Applied Science, UIET, Kurukshetra University, Kurukshetra 136118, Haryana (India)

2 Department of Physics, Maharishi Markandeshwar University, Mullana (Ambala) 133 207, Haryana (India)

Abstract

The dielectric constant (ε') and dielectric loss (ε״) of pristine and C5+ (70 MeV) ion irradiated samples of the PEEK have been investigated with the variation of temperature at different frequencies (100 Hz, 1 kHz, 10 kHz and 100 kHz). The maxima are obtained around 170 oC in dielectric constant (ε') vs. temperature (T) curve. This relaxation is linked with the movement of ketone (>C=0) dipoles linked to the main chain. The irradiation of polymers increases the orientational polarization due to increase in number of dipoles with fluence. The increase in dielectric constant (ε') and dielectric loss (ε'') is attributed to chain scissioning at higher fluence which results in an increase of free radicals and unsaturations. Copyright © 2018 VBRI Press.

Keywords

1.Sridharbabu,Y.;Prabha, T.; Quamara,J.K.;Ind. J. Pure & App.
Phys.,2002, 40,633.

2.Garg, M.; Kumar, S.; Quamara,J.K.;Ind. J. Pure & App. Phys.,
2001,39, 259.

3.Harviliak Jr., S.;Harviliak,S.J.,Dielectric and Mechanical
Relaxation inMaterial, Hanser Publishers: New York, 3, 1997

4.Chen, K.C.;Raimond,L.;Electrical Properties of Polymers
Chemical Principles, Hanser Publishers:New York, 20, 1987.

5.Lee,E. H.; Polyimides: Fundamentals and Applications; Ghosh,
M.K.; Mittal,K. L. (Eds.); Plenum Press: New York, 1996, pp.
309.

6.Electrets; G. M. Sessler(Ed); Springer-Verlag: Berlin, 1980.

7.Fink,B.K.; McCullough, R.L.;Gillespie,J.W.;Army Research
Laboratory, ARL-TR-2236, 2000.

8.Kirkwood, J. G.; J. Chem. Phys., 1939, 7,911.

9.Huo, P.;Cebe,P.;Macromolecules,1992,25, 902.

10.Kalia,R.;Sharma, V.;Sharma,J.K.;Journal of Polymer Research,
2012,19,1.

11.Zou,D.;Iwaaaki,S.;Tsutaui, T.;Saito,S.;Polymer, 1990, 31,
1888.

12.Dova, A. V.;Kaloderas,I.M.;Thermal Analysis of Polymers:
Fundametals and Applications, Menczel, J. D.;Prime, R.B. (Eds.);
John Wiley & Sons, 2009, Ch 6,pp.509.

13.Pradhan, D.K.; Choudhary, R.N.P.; Samantaray,B.K.;Int.J.
Electrochem.Sci.,2008,3,597.

14.Pandey,K.;Singh,M.;Asthana,N.;Dwivedi,M.M.;Agrawal,
S.L.; International Journal of Material Science,2011,1,9.

15.Lubin, G.; Handbook of fiber glass and advancedcomposites; Van
Norstrand Reinhold:New York,1982.

16.Hull,D.; An introduction to composite materials: Cambridge,
1981,16.

17.Nadia,A.A.; Farah., T.; Mohammed, N.;Sinaa,I.H.;Journal of
Al-Nahrain University, 2010, 13,73.

18.Fares,S.; Natural Science, 2011, 3, 1034.

19.Kumar,R.;Virk,H.S.;Verma,K.C.;Saha, A.;Prasad; Nuclear
Instruments and methods in Physics Research B,2006,251, 163.

20.Sinha, D.; Sahoo,K.L.;Sinha,U.B.;Chemseddine,A.;Swu, T.;
Fink,D.;Radiation Effects & Defects in Solids,2004,9,587.

21.Shinyama,K.;Baba, M.;Fujita,S.;In: Proceedings International
Conf. onMaterial Engg. For Resources, 1998,55.

22.Kang,P.H.;Lee, C.;Kim,K.Y.;J. Ind. Eng. Chem.,2007,13,250.

23.Kalia,R.;Sharma,V.; Mahna, S.K.; Sharma,J.K.;Polymer
Science,Ser. A,2014, 56, 837.

24.Litvinov, V. M.;Dias,A. A.;Macromolecules,2001,34,4051.

25.Alves,N. M.;Ribelles,J.L.G.;Tejedor, J.A.G.;Mano, J. F.;
Macromolecules,2004, 37, 3735.

26.Kannurpatti,A.R.;Anderson, K.J.;Anseth, J.W.;Bowman,C.N.;
Journal of Polymer Science, Part B: Polymer Physics,1997,35,
2297.

27.Kannurpatti,A. R.;Anseth, J.W.;Bowman,C.N.;Polymer,1998,
39,2507.

28.Schroeder, M. J.; Roland,C.M.;Macromolecules,2002,35, 2676.

29.Kramarenko,V.Y.;Ezquerra,T.A.; Sics,I.;Balta-Calleja, F.J.;
Privalko,V. P.;Journal of Chemical Physics,2000,113, 447.

30.Kalakkunnath,S.;Viscoelastic Relaxation Characteristics of
Rubbery Polymer Network and Engineering Polysters;PhD Thesis,
Lexington, Kentucky, 2007,10.

31.Schroeder, M. J.;Roland,C. M.;Macromolecules, 2002, 35,2676.

32.Fink,D.;Fundamentals of ion-irradiated polymers;Springer,
2004,63,372.

33.Alegaonkar1,P.S.;Bhoraskar,V.N.;Balaya, P.;Goyal,P. S.;Appl.
Phys. Lett;2002, 80, 640.

34.Shah,S.; Singh,D.;Qureshi,A.; Singh,N.L.;Singh, K.P.;Shrinet,
V.;Indian Journal of Pure and Applied Physics,2008,46,439.

35.Singh,N.L.;Sharma,A.;Shrinet,V.;Rakshit, A.K.;Avasthi,D.K.;
Bull. Mater. Sci.,2004,27,263.