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- W1996366355 abstract "The effect of high-energy 238U ions (11.6 MeV/n, flux 106 ions/cm2, GSI facility, DARMSTADT) on the various dielectric relaxation processes in Kapton-H polyimide using thermally stimulated discharge (TSD) current technique has been investigated. The irradiated Kapton-H samples (25 μm thickness, area 1.13 cm2) were polarized at different temperatures (363, 393, 423 and 473 K) under various biasing fields (140–600 kV/cm). TSD currents were obtained at the heating rate of 2 K/min. The peak appearing at low temperature and associated with dipolar polarization (β-transition) is largely affected in irradiated samples. This is mainly due to the demerization of the carbonyl groups. In the vicinity of β-transition, small multiple peaks in TSD current spectra are observed. These peaks have been associated with the cross-linking of imidic groups as a result of high-energy ion-irradiation. The same has been confirmed by the activation energy values of these peaks and also through the TSD current behaviour of repoled samples. Increase in activation energy of high-temperature peak (α-transition) associated with space charge relaxation is observed in irradiated samples. This is mainly due to the creation of new deep energy centers resulting from the formation of triple bonds and free radicals. The activation energy has been calculated using Bucci-plot method." @default.
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- W1996366355 date "2001-06-01" @default.
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- W1996366355 title "Effect of high energy ion-irradiation on the dielectric relaxation behaviour of Kapton-H polyimide film. Thermally stimulated depolarization current study" @default.
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- W1996366355 doi "https://doi.org/10.1016/s0168-583x(01)00321-4" @default.
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