Space environmental testing of thermal control foils at extreme temperatures

Details Space environmental testing of thermal control foils at extreme temperatures Space environmental testing of thermal control foils at extreme temperatures

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..161s&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

Scientific paper

Our current understanding regarding the evaluation of the thermal endurance and UV radiation stability of two different types of commercially available aromatic polyimides at elevated temperatures is presented. Such materials are typically used as thermal control foils. To characterise the thermal endurance we have performed a high vacuum thermal ageing campaign at 350°C up to 4452 hrs. During that test we found the mass loss to be higher for the K-film than for the U-film material. Further UV/VIS/NIR transmission and thermo-optical measurements revealed the degradation behaviour of both films versus time at 350°C. We found that in general the U-film degrades at a slower rate. To screen the radiation stability we performed an environmental UV test with samples being simultaneously at 100°, 230° and 350°C. After the test we noted that the K-film shows for all three temperatures a higher mass loss than the U-film. We also found a non-linear correlation of the activation energies for the mass loss of the K-film as a function of temperature. Additionally we found a higher loss of transmittance (UV/VIS) for the K-film and a higher degradation of the α/ɛ ratio when compared to the U-film. On the latter it seems that this degradation is temperature activated.

Affiliated with

Also associated with

No associations

Rating

Space environmental testing of thermal control foils at extreme temperatures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Space environmental testing of thermal control foils at extreme temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Space environmental testing of thermal control foils at extreme temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1153068