Atomic-Oxygen Undercutting of Protected Polymers in Low Earth Orbit

Banks, Bruce A.; Snyder, Aaron; Miller, Sharon K.; Groh, Kim K. de; Demko, Rikako

doi:10.2514/1.10726

Cited by 55 publications

(37 citation statements)

References 7 publications

(11 reference statements)

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“…These findings suggest that a thicker coating is required to prevent AO diffusion in LEO, where high AO flux exists. However, defects in the protective coating, either inherent or produced by hypervelocity impacts, will result in oxygen penetration and will permit accelerated AO erosion of the underlying polymer, a phenomenon known as undercutting . AO undercutting of protected Kapton has been extensively studied, both experimentally and theoretically .…”

Section: Modification Of Polyimides For Survivability In Leomentioning

confidence: 99%

Advances in Polyimide‐Based Materials for Space Applications

Gouzman¹,

Grossman²,

Verker³

et al. 2019

Advanced Materials

454

252

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The space environment raises many challenges for new materials development and ground characterization. These environmental hazards in space include solar radiation, energetic particles, vacuum, micrometeoroids and debris, and space plasma. In low Earth orbits, there is also a significant concentration of highly reactive atomic oxygen (AO). This Progress Report focuses on the development of space‐durable polyimide (PI)‐based materials and nanocomposites and their testing under simulated space environment. Commercial PIs suffer from AO‐induced erosion and surface electric charging. Modified PIs and PI‐based nanocomposites are developed and tested to resist degradation in space. The durability of PIs in AO is successfully increased by addition of polyhedral oligomeric silsesquioxane. Conductive materials are prepared based on composites of PI and either carbon nanotube (CNT) sheets or 3D‐graphene structures. 3D PI structures, which can expand PI space applications, made by either additive manufacturing (AM) or thermoforming, are presented. The selection of AM‐processable engineering polymers in general, and PIs in particular, is relatively limited. Here, innovative preliminary results of a PI‐based material processed by the PolyJet technology are presented.

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Section: Modification Of Polyimides For Survivability In Leomentioning

confidence: 99%

Advances in Polyimide‐Based Materials for Space Applications

Gouzman¹,

Grossman²,

Verker³

et al. 2019

Advanced Materials

454

252

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show abstract

“…Due to this reason, polyimide is used in many applications such as ion exchange membranes, metal absorbents, gas absorbents, separation filters, and adhesives. In space applications, polyimides are used for thermal blankets, electric insulators, satellite antenna covers, array substrates, and as polymeric membranes for solar sail systems [1][2]. It is important that polymers used in space are able to retain good tensile and optical properties during the expected lifetime of the space vehicle.…”

Section: Introductionmentioning

confidence: 99%

Effect of electron beam irradiation on polyimide film

Kang

Jeon

Jeun

et al. 2008

Journal of Industrial and Engineering Chemistry

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“…These coating methods are effective in improving the resistance against the LEO environment at the initial stages. However, coating methods are not effective in the long term due to the torch-blow effect induced by cracks, undercutting and separation from the polymer coating surface [17]. Therefore, the different concept to improve the properties and resistance of the CFRP (carbon fiber reinforced plastics) are necessary.…”

Section: Introductionmentioning

confidence: 99%

Inter-lamina Shear Strength of MWNT-reinforced Thin-Ply CFRP under LEO Space Environment

Moon¹,

Kim²

2017

Composites Research

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ABSTRACT:In this paper, the inter-lamina shear strength (ILSS) of multi-wall carbon nanotube (MWNT) reinforced carbon fiber reinforced plastics (CFRP) and thin-ply composites were verified under low earth orbit (LEO) space environment. CFRP, MWNT reinforced CFRP, thin-ply CFRP and MWNT reinforced thin-ply CFRP were tested after aging by using accelerated ground simulation equipment. The used ground simulation equipment can simulate high vacuum (2.5 × 10 -6 torr), atomic oxygen (AO, 9.15 × 10 14 atoms/cm 2 ·s), ultraviolet light (UV, 200 nm wave length) and thermal cycling (-70~100°C) simultaneously. The duration of aging experiment was twenty hours, which is an equivalent duration to that of STS-4 space shuttle condition. After the aging experiment, ILSS were measured at room temperature (27°C), high temperature (100°C) and low temperature (-100°C) to verify the effect of operation temperature. The MWNT and thin-ply shows good improvement of ILSS at ground condition especially with the thinply. And after LEO exposure large degradation of ILSS was observed at MWNT added composite due to the thermal cycle. And the degradation rate was much higher under the high temperature condition. But, at the low temperature condition, the ILSS was largely recovered due to the matrix toughening effect.

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Atomic-Oxygen Undercutting of Protected Polymers in Low Earth Orbit

Cited by 55 publications

References 7 publications

Advances in Polyimide‐Based Materials for Space Applications

Advances in Polyimide‐Based Materials for Space Applications

Effect of electron beam irradiation on polyimide film

Inter-lamina Shear Strength of MWNT-reinforced Thin-Ply CFRP under LEO Space Environment

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