Title: Laser Sintering of RTM385-SLS Thermoset Polyimide with Boron Nitride

Authors: Kathy C. Chuang, Will Spade, Justin Gillham, Daniel A. Scheiman, Linda S. McCorkle

DOI: 10.33599/nasampe/s.24.0035

Abstract: RTM385-SLS is a melt-processable thermoset polyimide resin specially formulated with a complex melt viscosity [ƞ*] of ~104-105 poise for laser sintering. RTM385-SLS resin powder was mixed with 20-25% of hexagonal boron nitride (h-BN) and subjected to laser sintering (LS) to print out “Green” disks and dogbone specimens which could be further post-cured in an oven to complete the crosslinking of the reactive phenylethynyllphthalic anhydride (PEPA) terminal groups within the resin to achieve a very high glass transition temperature (Tg) of 385°C. The cured composite specimens were then subjected to thermal analysis, thermal conductivity measurement and mechanical testing for characterization.

References: 1)David K. Leigh: “A Comparison of Polyamide 11 Mechanical Properties between Laser Sintering and Traditional Molding”, Proceedings of Solid Freeform Fabrication Symposium, 574-605 (2012). 2)R. D. Goodridge, C. J. Tuck, R. J. M. Hague: “Laser Sintering of Polyamides and Other Polymers”, Progress in Materials Science, 57(2), 229-267 (2012). 3)S. Berretta, K. E. Evans, O. Ghita: Processability of PEEK, “A New Polymer for High Temperature Sintering”, European Polymer Journal, 68, 243-266 (2015). 4)S. Brretta, Y. Wang, R. Davies, O. R. Ghita: “Polymer Viscosity, Particle Coalescence and Mechanical Performance in High Temperature Laser Sintering”, Journal of Materials Science, 51(10), 4778-4794 (2016). 5)Md S. Hassan, Kasi M. M. Billah, Samuel E. Hall, Sergio Sepulveda, Jamie E. Regis, Cory Marquez, Sergio Cordova, Jasmie Whitaker, Thomas Robison, James Keating, Evgeny Shafirovich, Yirong Lin: “Selective Laser Sintering of Thermoset Polymer”, Journal of Composite Science, 6(2), pp 41 (2022). 6)Kathy C. Chuang, Timothy Gornet, Hilmar Koerner: “Challenges in Laser Sintering of Melt-Processable Thermoset Imide Resins”, Proc. of CAMX Conference, Anaheim, CA, September 26-29 (2016). 7)Kathy C. Chuang, Timothy Gornet, Hilmar Koerner: “Laser Sintering of Thermoset Polyimide Composites”, Proc. of CAMX Conference, Anaheim, CA, September 23-26, (2019).

Conference: SAMPE 2024

Publication Date: 2024/05/20

SKU: TP24-0000000035

Pages: 8

Price: $16.00