Accession Number : AD0911880
Title : Fundamental Studies on Reactive Oligomers.
Descriptive Note : Summary rept. 1 Feb 72-31 Jan 73,
Corporate Author : NOTRE DAME UNIV IND
Personal Author(s) : D'Alelio,G. F.
Report Date : FEB 1973
Pagination or Media Count : 132
Abstract : The research reported in AFML-TR-70-39 Part 3, March 1972, was continued. Five new dipolarophilic-terminated oligomeric polyimides were prepared and reacted with the dipole, BDNO, to give some polymers with TGA inflections in air in the 500 C region. Styrene-, allyl- and phenol-terminated oligomeric polyimides were prepared and epoxidized. In all cases, the epoxide softening points increased and solubility decreased relative to their precursors. The TGA thermal stabilities of the cured epoxides in air show breaks in the 240-390 C region and inflections in the 300-570 C regions, depending on the structures and methods of cures. A number of amine- and anhydride-terminated oligomers were prepared and cured by epoxides to products having TGA breaks in air in the 240-300 C regions, and inflections in the 560-600 C regions. The curing of nitrile-terminated oligomers by copper halide catalysts did not yield promising results. The coreaction of dioxane-soluble amine-terminated oligomeric polyimides with dioxane-soluble anhydride-terminated oligomers appears to offer promising, practical systems having good processability which yield highly thermally stable polyimides as final products. (Author)
Descriptors : (*POLYMERS, SYNTHESIS(CHEMISTRY)), (*POLYAMIDE PLASTICS, SYNTHESIS(CHEMISTRY)), EPOXY RESINS, THERMOGRAVIMETRIC ANALYSIS, STYRENES, THERMAL STABILITY, PHENOLS, SOLUBILITY, AMINES, ANHYDRIDES, NITRILES, AGING(MATERIALS), MELTING POINT, ADDITION REACTIONS, DIFFERENTIAL THERMAL ANALYSIS, INFRARED SPECTROSCOPY, AIR, NITROGEN, PHENOLIC PLASTICS, AROMATIC COMPOUNDS, PURIFICATION
Subject Categories : Polymer Chemistry
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE