Adamantane-based aromatic polyethers with unsaturated groups in backbones and pendant chains of macromolecules

Bromine-containing polyetherimides with pendant adamantane and fluorene moieties: Synthesis and chemical transformations

“…The ether groups in the main chains of PEI VI are responsible for the absorption bands at 1280 and 1227 cm -1 . The pendant adamantane fragments in the chains of macromolecules in this IR spectrum give rise to the absorption bands at 1100, 1352, and 2909 cm -1 [4]. The IR spectrum of initial PEI X exhibits addi tional new bands at 1126-1300 and 1649 cm -1 (C-F and С=С vibrations of the pendant pentafluorostyrene groups, respectively) and the lack of absorption band of phenolic hydroxyl groups (3000-3400 cm -1 ), which is very strong in the IR spectrum of polymer IX.…”

“…At last, final polymer Х was synthesized by the nucleophilic substitution reaction of the phe nolic hydroxyl groups with pentafluorostyrene (XI) [4] (Syn Quest Co., United States). As shown bellow, polymers VIII-Х were prepared in quantitative yield.…”

“…These methods are exemplified by the introduction of ether bonds or hexafluoroisopropylidene groups into the main chains [5], as well as adamantane [4] and flu orene moieties [5] into the side chains of such poly mers. At last, the introduction of bromine atoms into aromatic rings of the main chains enhances the solu bility of the corresponding polymers, these atoms facilitating various chemical transformations.…”