Proton flux effects and prediction on the free radicals behavior of polyimide in vacuum using EPR measurements in ambient

Sun, Chengyue; Wu, Yiyong; Xiao, Jing; Sui, Yu; Yi, Zhong Zhou; Shen, Zicai; Wang, Li; Wang, Yi

doi:10.1016/j.nimb.2017.01.085

Cited by 4 publications

(1 citation statement)

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“…As a result, the surface concentration of C increases and the PI surface is transformed into a carbon-enriched structure, as confirmed by X-ray photoelectron spectroscopy (XPS) measurements of proton-irradiated PI [87]. Furthermore, the EPR measurements of PI irradiated with 100 keV-200 MeV protons with fluences of 4.0 × 10 15 protons/cm 2 -10 19 protons/cm 2 [107][108][109] revealed the formation of long-lifetime pyrolitic carbon radicals. It should be noted that lower proton energy leads to a faster increase in the pyrolytic carbon-radical-specific population with proton fluence [110,111].…”

Section: Changes In Chemical Propertiesmentioning

confidence: 79%

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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