AB-type monomers for the preparation of perfluorocycloalkene (PFCA) aryl ether polymers

Theoretical Explanation of Reaction Site Selectivity in the Addition of a Phenoxy Group to Perfluoropyridine

“…We suspect this is due to the equilibrium induced by the displacement of PhO – as a leaving group by the substitution of available F – , thus leading to 4 . A similar phenomenon was observed with substitutions involving aliphatic fluorocycylic alkenes such as perfluorocyclopentene whereby fluoride-catalyzed rearrangements were observed after phenolic additions . This then affords the opportunity for a dynamic equilibrium whereby available p -ArO – can participate in the reversible redistribution of product mixtures.…”

“…A similar phenomenon was observed with substitutions involving aliphatic fluorocycylic alkenes such as perfluorocyclopentene whereby fluoride-catalyzed rearrangements were observed after phenolic additions. 17 This then affords the opportunity for a dynamic equilibrium whereby available p-ArO − can participate in the reversible redistribution of product mixtures. This observation was validated by Vlasov and co-workers who demonstrated that reactions between perfluoropyridine and various phenols would result in scrambled products.…”

Chemical Epoxidation of Oleic Acid to Produce Ab Type Monomer for Fatty-Acid-Based Polyester Synthesis

“…Consequently, it can be further applied as a valuable AB-type monomer to synthesize bio-based polyester [11]. The use of AB monomer in step-growth polymerization reaction has been recognized as an alternative strategy to produce polymers with high molecular weight [12]. Self-condensation between phenyl halide and phenoxide owned by AB-type sulfone-based monomers has resulted in poly(ether sulfone) with a molecular weight of more than 110000 [13].…”

Acenaphthylene‐derived perfluorocyclobutyl aromatic ether polymers

“…Although radical chain‐growth homopolymerization and copolymerization of aromatic TFVE monomers does occur with limited success, the step‐growth polymerization of aromatic TFVE monomers by nucleophilic addition/elimination of bisnucleophiles such as common bisphenols has been established . In addition, our laboratory has also demonstrated a general methodology for the polymerization of bisphenols with perfluorocycloalkenes to give a complementary class of semifluorinated aryl ether polymers …”