Synthesis of novel copoly(ether ether ketones): Property evaluation and microstructure analysis by NMR

A series of copolymers were prepared by the reaction of various bisphenols with a 50:50 molar ratio of two bisfluoro compounds, 4,4′‐bis(1‐fluoro‐2‐trifluoromethyl benzyl) benzene and 4,4′‐difluorobenzophenone. The synthesized polymers were well characterized for their thermal, mechanical, and electrical performances. The copolymers showed a better set of properties than their analogous homopolymers derived from 4,4′‐bis(1‐fluoro‐2‐trifluoromethyl benzyl) benzene and bisphenols. The microstructures of the copolymers were analyzed by 1 H‐, 13 C‐, 19 F‐, distortionless enhancement by polarization transfer 90, two‐dimensional 1 H– 1 H homonuclear correlation spectroscopy, and 13 C– 1 H correlation spectroscopy NMR techniques.