Fluorinated Poly(arylene ether-1,3,4-oxadiazole)s Containing a 4-Bromophenyl Pendant Group and Its Phosphonated Derivatives: Synthesis, Spectroscopic Characterization, Thermal and Dielectric Studies

Abstract

The synthesis and characterization of new fluorinated poly(arylene ether 1,3,4-oxadiazole) with a 4-bromophenyl pendant group (8F-PAEOx-Br) have been investigated, these pendant 4-bromophenyl group provides respective phosphonated derivatives from a straightforward palladium catalysed synthetic route. Molecular structural characterization of all the monomers and polymers was achieved by FT-IR, NMR and analytical techniques. The gel permeation chromatography (GPC) shows the weight-average molecular weight (M _w ) of 8F-PAEOx-Br was 81100 (M _w/M _n = 2.42). Thermal properties of all the polymers were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Dielectric properties were performed for compressed polymer tablets and results were discussed.

Keywords:

• Dielectric properties
• Fluoropolymers
• Oxadiazole
• Phosphonation
• Thermal properties

ACKNOWLEDGMENTS

The authors gratefully acknowledge Indian Institute of Science, STIC, and SICART for providing NMR, TGA and GPC measurements. S. D. Ganesh would like to acknowledge the funding support of University Grants Commission for granting the financial assistance in meritorious category scheme.