Selective synthesis of cyclic-polymer-free poly(ether sulfone)s with OH ends or F ends by non-stoichiometric, reversible polycondensation

Non-stoichiometric, reversible polycondensation of bisphenol disilyl ether and bis(4-fluorophenyl) sulfone is a convenient approach to synthesize telechelic PES end-capped with the excess monomer, without the formation of cyclic polymers.