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Polymer Bulletin

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01-06-2015 | Original Paper

Preparation of biphenyl perfluorocyclobutyl (BP-PFCB) polyethylene glycol (PEG) copolymers by the formation of fluorinated arylene vinylene ether (FAVE)

Authors: Dakarai K. Brown, Jean-Marc Cracowski, Scott T. Iacono, Ken Christensen, Dennis W. Smith Jr.

Published in: Polymer Bulletin | Issue 6/2015

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Abstract

A series of biphenyl per fluorocyclobutyl (BP-PFCB) polyethylene glycol (PEG) copolymers were prepared by nucleophilic addition the hydroxyl end groups of PEG to trifluorovinyl ether (TFVE) end groups of biphenyl perfluorocyclobutyl (BP-PFCB) oligomers. Upon addition, copolymers are linked through a new fluorinated arylene vinylene ether (FAVE) bond. Resulting copolymers were characterized by ATR-FTIR, ¹H, and ¹⁹F NMR analysis. Gel permeation chromatography (GPC) showed a number-average molecular weights (M _ns) of polymers from 9000 to 16,000. A moderated increase in M _ns was observed compared to corresponding oligomers. Differential scanning calorimetry (DSC) thermograms revealed glass transition temperatures (T _gs) from −25 to 127 °C. All copolymers showed one copolymer-specific T _g. All T _gs were compared to the theoretical values calculated from the Fox equation. Comparisons showed T _gs became more agreeable at the lowest and highest PEG weight fractions. Thermal gravimetric analysis (TGA) studies showed a two-stage degradation in nitrogen and air that corresponded to copolymer weight percent. The onsets of degradations were from 343 to 360 °C for copolymers in air and from 333 to 343 °C for copolymers in nitrogen.

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Title: Preparation of biphenyl perfluorocyclobutyl (BP-PFCB) polyethylene glycol (PEG) copolymers by the formation of fluorinated arylene vinylene ether (FAVE)
Authors: Dakarai K. Brown
Jean-Marc Cracowski
Scott T. Iacono
Ken Christensen
Dennis W. Smith Jr.
Publication date: 01-06-2015
Publisher: Springer Berlin Heidelberg
Published in: Polymer Bulletin / Issue 6/2015
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI: https://doi.org/10.1007/s00289-015-1344-1

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