The effects of UV, electrons and protons on selection of binders and pigments for white thermal control coatings

Details The effects of UV, electrons and protons on selection of binders and pigments for white thermal control coatings The effects of UV, electrons and protons on selection of binders and pigments for white thermal control coatings

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..723z&link_type=abstract

In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla

Computer Science

Space Environment, Materials, Coatings

Scientific paper

Through the in-situ measurement of solar absorptivity (αs) for white thermal control coatings in simulated space environment on ground, the separated radiation effect of UV, electron and proton is studied on selected binders(methyl silicone resin, additional methyl ethyl silicone rubber, acrylic resin) and pigments (zinc oxide, titanium dioxide, zirconium dioxide). The experimental results demonstrate that the UV exposure is vital for the changes of solar absorptivity (Δαs) for white thermal control coatings among various space radiation factors. After 1000 ESH of UV exposure, the stability for binders is: acrylic resin>methyl silicon resin>additional methyl ethyl silicone rubber; and the stability for pigments is: zinc oxide>zirconium dioxide>titanium dioxide. The changes of solar absorptivity is not obvious for selected binders and pigments except for titanium dioxide after 1.5×1015e/cm2 electron (50KV energy) and 5×1014 p/cm2 proton (50KV energy) radiation, respectively.

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