Aluminum-catalyzed statistical copolymerization of mono-, tri- and penta-fluorophenyl glycidyl ether with ethylene oxide and epichlorohydrin

Abstract

The copolymerization of fluorophenyl glycidyl ether (FPGE, including 4-monofluorophenyl glycidyl ether (MFPGE), 3,4,5-trifluorophenyl glycidyl ether (TFPGE) and 2,3,4,5,6-pentafluorophenyl glycidyl ether (PFPGE)) with ethylene oxide (EO) and epichlorohydrin (ECH) by an aluminium-based catalyst i-Bu₃Al/H₃PO₄/DBU afforded a new series of fluorine-polyethers with a high molecular weight and controlled fluorine distribution. Fluorine could be random, gradient, tapered and block incorporated into poly(EO) and poly(ECH) quantitatively. The simultaneous copolymerization of FPGE with EO afforded MFPGE–EO, TFPGE–EO and PFPGE–EO copolymers with random, gradient, and tapered distribution of fluorine, respectively. The simultaneous copolymerization of FPGE with ECH afforded MFPGE–ECH, TFPGE–ECH and PFPGE–ECH copolymers with random and gradient distribution of fluorine, respectively. The sequential copolymerization of FPGE with EO and ECH afforded diblock and triblock copolymers such as EO–FPGE, ECH–FPGE, EO–FPGE–EO, and ECH–FPGE–ECH with block distribution of fluorine. The fluorine distribution of the obtained polyethers had a significant effect on their mechanical properties.