Thermally conductive electrically insulating aromatic silicone film adhesive for the New Horizons mission

Keith S. Caruso; Patrick Hogue; Kareem M. Monib

doi:10.1117/12.560430

15 October 2004 Thermally conductive electrically insulating aromatic silicone film adhesive for the New Horizons mission

Keith S. Caruso, Patrick Hogue, Kareem M. Monib

Author Affiliations +

Proceedings Volume 5526, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control; (2004) https://doi.org/10.1117/12.560430
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

This paper describes the characterization of a thermally conductive, electrically insulating aromatic silicone film adhesive used in a flexible heat sink assembly that is part of an optical telescope aboard the planned New Horizons mission to Pluto and the Kuiper Belt. This application requires high thermal conductivity, high electrical resistance, low-temperature flexibility, resistance to creep, and very low outgassing. Post-cure conditioning in thermal vacuum was shown to drastically reduce the total mass loss (TML) and collected volatile condensable material (CVCM) in standard ASTM outgassing tests. Thermal vacuum treatment also affected activation energy and diffusion rate of the adhesive as determined by multi-rate and isothermal thermogravimetric analysis. Dynamic mechanical testing was performed to compare stiffness of the adhesive under representative loads at cryogenic temperatures to its stiffness at ambient temperature. The material was shown to remain relatively flexible at the minimum operating temperature for this mission. Test data also indicate the adhesive is resistant to creep at sub-ambient temperatures.

Citation Download Citation

Keith S. Caruso, Patrick Hogue, and Kareem M. Monib "Thermally conductive electrically insulating aromatic silicone film adhesive for the New Horizons mission", Proc. SPIE 5526, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control, (15 October 2004); https://doi.org/10.1117/12.560430

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