Novel Polyimide System Based on Nitro Displacement/Diels-Alder Reactions.

Poly(ether-imides) were prepared by two simultaneous reactions, that is, Diels-Alder reaction and nitro displacement reaction. Thus 3-nitrophthalic anhydride was reacted with furfuryl amine and the resultant amic acid was then reacted with three bismaleimides (2a–c) and disodium salt of bisphenol–A. The obtained polymers were treated with acetic anhydride to form cyclic imide, as well as aromatization of Diels-Alder adduct. The poly(ether-imide)s were characterized by IR spectral studies and theromgravimetry. A “in situ” polymerization on glass fibers was also carried out and the laminates were characterized by physical, mechanical, and chemical properties. [ABSTRACT FROM AUTHOR]