Fig. 4: Structural analysis of ECTFE P1 synthesized in this work and commercial Halar®.

a Chemical structure of P1. b 1H NMR spectra and c 19F NMR spectra of P1 (blue line) and Halar® (black line) with C2D2Cl4 at 120 °C. d MALDI-TOF mass spectrum of ethylene-trifluoroethylene copolymer prepared by reducing ECTFE. e XRD patterns of P5, Halar®, PE and PCTFE. Insets are 2D-WAXD patterns of P5 and Halar®.