The Suitability of Loctite 326 for Thermal Emission Measurements

• DOI: 10.1007/s40870-016-0077-z
• Publication Date: 2016-09-06T16:22:09Z
• Authors: M. C. Akin; R. Chau
• Keywords: 02 engineering and technology; 0210 nano-technology

The self-emissions of Loctite 326, Stycast 1266, and LiF were studied to determine their suitability for spectroscopy- and pyrometry-based shock temperature measurements. Stycast 1266 is anecdotally known to be a bright emitter; we observed significant non-thermal emission persisting over 400 ns. Loctite 326 was found to have weaker emission at the same shock conditions, which depends on the degree of cure of the glue. Uncured Loctite emitted more brightly. LiF was found to assist cure of the Loctite and to provide an emission-free temporal window suitable for making temperature measurements. From this, we conclude that glues must be carefully considered, and ideally avoided, in shock experiments with T >2000 K. If glues cannot be avoided, care must be given to the wavelengths used to determine T, to avoid complications from non-thermal emission.