Synthesis and thermal behavior of some brominated bismaleimides and polyaspartimides

Abstract

Brominated bismaleimides were synthesized by the reaction of brominated bisphenols with 3-or 4-maleimidobenzoyl chloride. The reaction of these maleimides with various aromatic diamines yielded brominated polyaspartimides. The monomers and polymers were characterized by Fourier transformed infrared and proton nuclear magnetic resonance spectroscopy. Thermal behavior of these brominated polyaspartimides was studied and compared with that of related polyaspartimides having other substituents instead of bromine or other bridges in the bisphenolic segment.

A thermally healable polyhedral oligomeric silsesquioxane (POSS) nanocomposite based on Diels–Alder chemistry

“…The spectrum of MPBMI showed the benzene framework absorption band at 1512 cm À1 , the carbonyl doublet characteristic peak at 1770 cm À1 , and the CQO stretching vibrations of the imide group at 1709 cm À1 . 10 In the spectrum of FG-POSS, the absorption bands at 1508 and 1597 cm À1 were ascribed to the furan heterocycle. 11 The FTIR spectrum of the DA adduct showed a shift of the carbonyl doublet characteristic peak and the imide CQO stretching vibrations to higher wavenumbers of 1774 and 1713 cm À1 , respectively, which indicates the formation of DA bonds between furan and maleimide groups.…”