Effect of Neutron and Proton Irradiation on Some Properties of Kapton

Shrinet, V.; Chaturvedi, U. K.; Agrawal, S.K.; Rai, V. N.; Nigam, A.K.

doi:10.1007/978-1-4615-7637-2_38

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…Formation of scattered blisters with size of~10 µm on the surface of PI irradiated with 250 keV protons to the fluence of 7 × 10 15 protons/cm 2 was reported by Shrinet et al [99]. The blistering mechanism is correlated with the release and subsequent coalescence of CO molecules on the surface of PI film during proton-irradiation.…”

Section: Surface Morphologymentioning

confidence: 63%

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Review of Radiation-Induced Effects in Polyimide

Plis¹,

Engelhart²,

Cooper

et al. 2019

Applied Sciences

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Polyimide (PI, Kapton-H®) films are widely utilized in the spacecraft industry for their insulating properties, mechanical durability, light weight, and chemical resistance to radiation. Still PI materials remain exposed to a combination of high-energy electrons, protons, and ultraviolet (UV) photons, particles primarily responsible for radiation-induced damage in geosynchronous Earth orbit (GEO), which drastically change PI’s properties. This work reviews the effect of electron, proton, and UV photon irradiation on the material properties (morphology, absorption, mechanical properties, and charge transport) of PI. The different damaging mechanisms and chemical consequences that drive changes in the material properties of PI caused by each individual kind of irradiation will be discussed in detail.

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Section: Surface Morphologymentioning

confidence: 63%

“…Vibrational assignments of polyimide. 5 keV electrons demonstrated evidence of swelling due to irradiation-induced cross-link formation[99] manifesting itself as a re-positioning of imide deformation bands in the FTIR spectrum of irradiated PI[71].…”

mentioning

confidence: 99%

Review of Radiation-Induced Effects in Polyimide

Plis¹,

Engelhart²,

Cooper

et al. 2019

Applied Sciences

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“…from 0 to 3 days). This may be because the water absorption capacity in kapton-H samples has been increased due to the presence of carbonyl groups and oxygen of ether linkages which are the most prominent sites where the water molecules can be Downloaded by [McMaster University] at 21:19 26 December 2014 bound (14). Ether-bridged polyimide shows lower water absorption capability than those linked with carbonyl groups; the C−O group plays a major role in increasing the water absorption ability by forming hydrogen bonding with water molecules (15).…”

Section: Methodsmentioning

confidence: 99%

Effect of water absorption on pristine and ion-irradiated kapton-H polyimide using thermally stimulated depolarization current technique

Sharma

Quamara

2013

Radiation Effects and Defects in Solids

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In this paper we report the effect of water absorption on pristine and 75 MeV oxygen ion-irradiated kapton-H polyimide by using the thermally stimulated depolarization current (TSDC) technique. The TSDC spectra reveal two significant peaks at low and intermediate temperatures around 30 • C and 110 • C termed as γ -peak (absorbed water-relaxation) and β-peak (dipolar-relaxation), respectively. The strength of the low-temperature peak (γ -peak) is affected in the opposite mode for pristine and ion-irradiated samples. A current reversal has been observed at 60 • C almost in all the cases; this can be associated with the presence of homocharges. The current reversal that appears here can be correlated with the internally developed field in the sample as the applied electric field is not very high. Activation energy has been calculated by using the Debye relaxation process. The value of activation energy for the γ -peak varies from 0.4 to 0.8 eV. Cole-Cole distribution, a relaxation process, is associated with distribution of relaxation time which can be measured using a distribution function. The enhancement in the distribution of τ can be associated with the dipolar relaxation process owing to the formation of some new radiation-induced sub-polar groups.

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Esca and reels characterization of electrically conductive polyimide obtained by ion bombardment in the keV range

Marletta

Oliveri

Ferla

et al. 1988

Surface & Interface Analysis

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Polyimide films were bombarded with Ar+ at 150 keV at various doses from 5 x 10" to 2 x lo'' ions cm-'. Ion bombardment was found to produce a drastic decrease of the electrical resistivity of the polyimide from about 1OI6 to 3 x R cm, the effect being dependent on the ion dose. The chemical structure of the conductive films obtained was characterized by means of ESCA and REELS techniques. The modification of the original polymer seems to proceed at low ion doses (up to 5 x l O I 4 ions cm-') by means of the progressive elimination of the carbonyl groups and the related destruction of the imidic rings, while at high doses (from 5 x 10'' ions cm-') the carbonization of the polyimide wcurs with the production of an amorphous carbon still containing significant amount of residual N and 0 atoms.

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Effect of Neutron and Proton Irradiation on Some Properties of Kapton

Cited by 8 publications

References 8 publications

Review of Radiation-Induced Effects in Polyimide

Review of Radiation-Induced Effects in Polyimide

Effect of water absorption on pristine and ion-irradiated kapton-H polyimide using thermally stimulated depolarization current technique

Esca and reels characterization of electrically conductive polyimide obtained by ion bombardment in the keV range

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