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Transient Current Investigations in Ion Irradiated Liquid Crystalline Polyurethane


Affiliations
1 Department of Physics, NIT Kurukshetra, Haryana 136 119, India
2 Department of Applied Physics, Government Engineering college, Nilokheri 132 117, India
 

Swift heavy ions (SHI) irradiation of Oxygen (O7+) beam with different ions fluence bring the modifications in the electrical conduction behavior of liquid crystalline Polyurethane (LCPU). The persent investigation carried out under different transientconditions in the operating temperature range of 50-220°C at various selectric fields of 4.35-43.45 kV/cm. The transient currents show thehyperbolic decay character and the decay exponent Δt (one-tenth decay time) dependent on the field and temperature. Theincrease in I0 /Isvalues (where I0 represents the current observe dimmediately after applying the voltage and Ismeans the steady state current) and the mobility variation at high operating temperatures shows the appearance of mesophase. The transient currents originated due to the dipolar nature of carbonyl(C＝O) groups in the main chain of LCPU and the trapping charge carriers.

Keywords

Electrical conduction measurement, Transient,Liquid crystalline Polyurethane
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  • Janik H, Pałys B &Petrovic Z S, Macromolecular rapid communications, 24(3) (2003) 265.

  • Parnell S, Min K &Cakmak M, Polymer, 44(18) (2003) 5137.

  • Kumar R & Singh P, Results in physics, 3 (2013) 122.

  • Hnatowicz V & Fink D,Fundamentals of ion-irradiated polymers, (Springer), (63) (2004) 349.

  • Ji Y, Bai Y, Liu X &Jia K, Advanced Industrial and Engineering Polymer Research, 3(4) (2020), 160.

  • Zhou Z, Li W, Qian J, Liu W, Wang Y, Zhang X & Zhang Y, Molecules, 27(4) (2022), 1336.

  • Bukowczan A, Raftopoulos K N, Czajkowski M, Szefer E, Hebda E, & Pielichowski K, Journal of Molecular Liquids, 348(2022), 118069.

  • Raj P, Lal S, Samui A B, Mahna S K, & Quamara J K, International Journal of Polymer Analysis and Characterization, 16(3) (2011) 211.

  • McCulloch I, Heeney M, Bailey C, Genevicius K, MacDonald I, Shkunov M & Toney M F, Nature materials, 5(4) (2006) 328.

  • Funahashi M, Shimura H, Yoshio M & Kato T, In Liquid crystalline functional assemblies and their supramolecular structures, edited by Kato T (Springer Berlin Heidelberg) (2008) 151 .

  • Avlyanov J K, Calvert JM, Crawford R J, Mac Diarmid A G, Shashidhar R, Vargo T G, & Wynne K J, U.S. Patent No. 5,828,432 (Washington, DC: U.S. Patent and Trademark Office), 1998.

  • Genevičius K, Österbacka R, Juška G, Arlauskas K & Stubb H, Thin Solid Films, 403 (2002), 415.

  • Goyal G, Garg M & Quamara J K, Thin Solid Films, 516(21) (2008), 7925.

  • Guo G, Hirao T, Laird J S, Onoda S, Wakasa T, Yamakawa T, &Kamiya T, Nuclear Science, IEEE Transactions on, 51(5) (2004), 2834.

  • Wintle H J, Solid State Electronics, 18(12) (1975), 1039.

  • Gerhard M R, Electrical Insulation, IEEE Transactions on, (5) (1987), 531.

  • Sessler G M, Hahn B & Yoon D Y, Journal Of applied physics, 60 (1) (1986) 318. LAL et al.: ION IRRADIATED LIQUIDCRYSTALLINE POLYURETHANE 423

  • Vanderschueren J & Linkens A, Journal of Applied Physics, 49 (7) (1978) 4195.

  • Quamara J K &Kaushik B K, Indian journal of pure & applied physics, 34(8) (1996) 553.

  • Raj P, Lal S, Samui A B, Mahna S K, & Quamara J K, International Journal of Polymer Analysis and Characterization, 17(3)(2012), 235

  • Sawa G, Iida K, Nakamura S & Ieda M, IEEE Transactions on Electrical Insulation, (2) (1980) 112.

  • Deshmukh S H, Burghate D K, Akhare V P, Deogaonkar V S, Deshmukh P T & Deshmukh M S, Bulletin of Materials Science, 30(1) (2007) 51.

  • Garg M &Quamara J K, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 179(3) (2001), 389.

  • Hioki T, Noda S, Sugiura M, Kakeno M, Yamada K & Kawamoto J, Applied Physics Letters, 43(1) (1983), 30.

  • Švorčík V, Miček I, Rybka V, Hnatowicz V & Černý F, Journal of Materials Research, 12(06) (1997), 1661.


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  • Transient Current Investigations in Ion Irradiated Liquid Crystalline Polyurethane

Abstract Views: 154  |  PDF Views: 85

Authors

Sohan Lal
Department of Physics, NIT Kurukshetra, Haryana 136 119, India
J. K. Quamara
Department of Applied Physics, Government Engineering college, Nilokheri 132 117, India

Abstract


Swift heavy ions (SHI) irradiation of Oxygen (O7+) beam with different ions fluence bring the modifications in the electrical conduction behavior of liquid crystalline Polyurethane (LCPU). The persent investigation carried out under different transientconditions in the operating temperature range of 50-220°C at various selectric fields of 4.35-43.45 kV/cm. The transient currents show thehyperbolic decay character and the decay exponent Δt (one-tenth decay time) dependent on the field and temperature. Theincrease in I0 /Isvalues (where I0 represents the current observe dimmediately after applying the voltage and Ismeans the steady state current) and the mobility variation at high operating temperatures shows the appearance of mesophase. The transient currents originated due to the dipolar nature of carbonyl(C＝O) groups in the main chain of LCPU and the trapping charge carriers.

Keywords


Electrical conduction measurement, Transient,Liquid crystalline Polyurethane

References