Abstract
As part of an effort to develop a low-volatile, essentially dry, carbon fiber tape from a phenylethynyl-terminated imide for use in heated head automated tow placement, a 70:30 blend of LaRCTM PETI-5 and LaRCTM PETI-IAX was prepared in N-methyl-2-pyrrolidinone by mixing the phenylethynylterminated amide acid solutions together. Solutions of the amide acids and the blend were characterized by size exclusion chromatography after aging at room temperature and at 5 °C over a 30-day period. Thin films were periodically cast from the solutions, thermally cured, and the tensile properties determined. Unoriented thin-film tensile properties were unaffected by aging conditions over the 30-day period whereas the weight average molecular weights of the phenylethynyl-terminated amide acids decreased. Imide oligomers were prepared from the amide acids, characterized, and thermally cured. A low-volatile tape prepared from prepreg of the 70:30 blend was fabricated into composites by processing in a vacuum press. The thin-film tensile and composite properties of the blend generally followed a rule of mixtures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
