Poly(aryletherketone)s containing 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethene (BPC) were synthesized by the cesium fluoride initiated polymerization of 1,1-dichloro-2,2-bis(4-t-butyldimethylsiloxyhenyl)ethane with 4,4'-difluorobenzophenone (BP-F). These polymers exhibit high char yields by thermogravimetric analysis (TGA), and low heat release capacities were measured by pyrolysis combustion flow calorimetry (PCFC). Poly(aryletherketone)s were prepared from BP-F and various ratios of BPC and bisphenol-A (BPA), and their thermal properties characterized by TGA and PCFC.