Simulated space vacuum ultraviolet (VUV) exposure testing for polymer films

Dever, Joyce A.; Pietromica, Anthony J.; Stueber, Thomas J.; Sechkar, Edward A.; Messer, Russell

doi:10.2514/6.2001-1054

Cited by 25 publications

(11 citation statements)

References 4 publications

(5 reference statements)

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“…Experimental data on degradation of epoxy resin composites during SETAS, LDEF, MEEP, SARE, AORP, DSPSE, ESEM, EuReCa, HST, MDIM, MIS and MPID missions in LEO [15] are available. However, because detailed investigation of the kinetics of reactions in the composites in space is expensive and difficult, a number of investigations were done in laboratory free space environment simulators, where individual factors or combinations of factors prevalent in free space are simulated [16][17][18]. In an attempt to simulate the combinations of irradiations by various well particle and photon fluxes which might be encountered in free space, most simulators involve a combination of plasma chambers or ion accelerators with an electron gun, UV-VUV and/or X-ray sources.…”

Section: Introductionmentioning

confidence: 99%

Etching and structure transformations in uncured epoxy resin under rf-plasma and plasma immersion ion implantation

Kondyurin

Bilek

2010

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Introductionmentioning

confidence: 99%

Etching and structure transformations in uncured epoxy resin under rf-plasma and plasma immersion ion implantation

Kondyurin

Bilek

2010

Nuclear Instruments and Methods in Physics Research Section B:

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“…UV exposure may have effects on polymers and other materials used in lightweight mirror material in spacecraft applications. In this latter case, the effects of UV exposure need to be accounted for due to their potential impacts on the thermal management of a spacecraft and during application in composite mirror structures [75] [76,77].…”

Section: Ultraviolet Radiationmentioning

confidence: 99%

Mirrors for Space Telescopes: Degradation Issues

Garoli¹,

Marcos²,

Larruquert³

et al. 2020

Preprint

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Mirrors are a subset of optical components essential for the success of current and future space missions. Most of the telescopes for space programs ranging from Earth Observation to Astrophysics and covering the whole electromagnetic spectrum from X-rays to Far-Infrared are based on reflective optics. Mirrors operate in diverse and harsh environments that range from Low-Earth Orbit, to interplanetary orbits and the deep space. The operational life of space observatories spans from minutes (sounding rockets) to decades (large observatories), and the performance of the mirrors within the mission lifetime is susceptible to degrade, which results in a drop of the instrument throughput, which in turn affects the scientific return. Therefore, the knowledge of potential degradation mechanisms, how they affect mirror performance, and how to prevent them is of paramount importance to ensure the long-term success of space telescopes. In this review we report an overview on current mirror technology for space missions with a focus on the importance of degradation and radiation resistance of the coating materials. A special attention will be given to degradation effects on mirrors for the far and extreme UV as in these ranges the degradation is enhanced by the strong absorption of most contaminants.

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“…Due to difficulty in conducting experiments in true space environment, ground-based facilities were developed to simulate space conditions. 10,19,20 In an experimental study that simulated space conditions in a ground-based facility, Zhao et al 19 investigated the individual and synergistic effects of UV and AO on polytetrafluroethylene (Teflon). UV alone caused negligible mass loss.…”

Section: Introductionmentioning

confidence: 99%

Erosion yield of epoxy–silica nanocomposites at the lower earth orbit environment of the International Space Station

Yagnamurthy

Chen

et al. 2012

Journal of Composite Materials

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The erosive effect of ultraviolet radiation and atomic oxygen at the lower earth orbit space environment of the International Space Station on Epon 862 based epoxy composites with 12 and 100 nm silica particles was investigated. Although exposure to ultraviolet radiation had a small effect on surface erosion, restricted to 2 µm of the top surface, concurrent exposure to ultraviolet radiation and atomic oxygen resulted in significant erosion. Atomic oxygen erosion of nanocomposites with 1–5 wt% silica particles resulted in a carpet-like residual surface layer whose thickness and morphology were dependent on the size and concentration of the embedded silica particles. The eroded surface of the control epoxy had high surface roughness in the form of 10–40 µm long conical protrusions. With the addition of silica particles, the residual surface layer became fibrous and rich in silica particles, and its density increased with the weight fraction and size of the silica particles. The large and uneven erosion depth of samples exposed to atomic oxygen and ultraviolet radiation resulted in a surface damage layer with average thickness between 5 and 100 µm with significantly reduced mechanical properties compared to the surface of the as-fabricated nanocomposites. The erosion yield of the control epoxy due to atomic oxygen was 4.36 × 10−24 cm3/atom and the addition of silica nanoparticles reduced it significantly to 1.78 × 10−25 cm3/atom. In particular, silica nanoparticles of diameter 12 and 100 nm and weight fraction 5% reduced the erosion yield of the control epoxy by 90% and 96%, respectively.

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Simulated space vacuum ultraviolet (VUV) exposure testing for polymer films

Cited by 25 publications

References 4 publications

Etching and structure transformations in uncured epoxy resin under rf-plasma and plasma immersion ion implantation

Etching and structure transformations in uncured epoxy resin under rf-plasma and plasma immersion ion implantation

Mirrors for Space Telescopes: Degradation Issues

Erosion yield of epoxy–silica nanocomposites at the lower earth orbit environment of the International Space Station

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