Title: High-Char Phthalonitrile Resin Blends

Authors: Tristan Butler, Boris Dyatkin, Brian Chaloux, Albert Epshteyn and Matthew Laskoski

DOI: 10.33599/nasampe/s.20.0373

Abstract: Oligomeric phthalonitrile resins exhibit excellent char retention when heated to 1000 °C under nitrogen (> 75%). However, very little is known about the properties and performance of these materials when heated to higher temperatures (> 1500 °C). In addition, blended systems that contain phthalonitrile resins and secondary phases specifically included to enhance char formation at temperatures in excess of 1000 °C have not been previously synthesized. In order to better understand the char forming properties of phthalonitrile resins and identify conditions that maximize char yield, thermogravimetric analysis scans to temperatures exceeding 2000 °C were conducted on a series of different phthalonitrile resins and blended systems. The resulting char from these studies was then characterized via powder X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. Differential scanning calorimetry and rheological characterizations were used to determine the proper thermal treatments for curing blended systems and to probe the interactions between different phases of the blend.

References: 1. Dang, A.; Zhao, Z.; Tang, C.; Fang, C.; Kong, S.; Khan, M.; Li, T.; Zhao, T.; Li, H., Effect of Phenolic Resin on Micropores Development in Carbon Foam with High Performance. Materials (Basel) 2019, 12 (8). 2. Abrahamson, J. P.; Jain, A.; van Duin, A. C. T.; Vander Wal, R. L., Carbon structure and the resulting graphitizability upon oxygen evolution. Carbon 2018, 135, 171-179. 3. Kim, T.; Lee, J.; Lee, K.-H., Full graphitization of amorphous carbon by microwave heating. RSC Advances 2016, 6 (29), 24667-24674. 4. Kim, D.-W.; Kil, H.-S.; Kim, J.; Mochida, I.; Nakabayashi, K.; Rhee, C. K.; Miyawaki, J.; Yoon, S.-H., Highly graphitized carbon from non-graphitizable raw material and its formation mechanism based on domain theory. Carbon 2017, 121, 301-308. 5. Yan, H.; Mahanta, N. K.; Wang, B.; Wang, S.; Abramson, A. R.; Cakmak, M., Structural evolution in graphitization of nanofibers and mats from electrospun polyimide–mesophase pitch blends. Carbon 2014, 71, 303-318. 6. Butler, T.; Alden, S. E.; Taylor, M.; Deese, S.; Rider, D. A.; Laskoski, M., Oligomeric phthalonitriles and tetrakis(phenylethynyl)benzene blends with improved processing and thermal properties. Journal of Polymer Science Part A: Polymer Chemistry 2018, 56 (23), 2630-2640. 7. Keller, T. M.; Dominguez, D. D.; Laskoski, M., Oligomeric Bisphenol A-Based PEEK-like Phthalonitrile-Cure and Polymer Properties. Journal of Polymer Science Part a-Polymer Chemistry 2016, 54 (23), 3769-3777.

Conference: SAMPE 2020 | Virtual Series

Publication Date: 2020/06/01

SKU: TP20-0000000373

Pages: 9

Price: FREE