Characterization of cure chemistry of selected phenylethynyl-terminated polyimides and model compounds
- College of William and Mary, Williamsburg, VA (United States)
- NASA Langley Research Center, Hampton, VA (United States)
The ability to process high performance polymers into useful adhesives and high quality composites has been significantly advanced by synthetic techniques in which oligomers terminated with reactive groups cure or crosslink at elevated temperature after the article has been fabricated. Several matrix resin systems of considerable interest to the aerospace community utilize phenylothyny-terminated Imido (PETI) technology developed at the Langley Flesearch Center to achieve this advantage. The present paper addresses the cure chemistry of PETI polymers. The thermal cure of selected oligomers and model compounds was studied using a variety of analytical techniques Including differential scanning calorimetry, high pressure liquid chromatography, and Fourier transform Infrared, nuclear magnetic resonance and mass spectroscoples. Several reaction products were Isolated and attempts at Identification have been made. The intent of this research is to provide fundamental insight into the molecular structure of these new engineering materials so that their performance and durability can be more adequately appreciated.
- OSTI ID:
- 412043
- Report Number(s):
- CONF-960310--
- Country of Publication:
- United States
- Language:
- English
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