Abstract: Two novel types of Bisphenol monomers with different pendant long chains are synthesized and characterized by element analysis and nuclear magnetic resonance(NMR). Poly(ether ether ketone)s with different pendant long chains are prepared via aromatic nucleophilic substitution reaction from 1,4-bis(4-fluorobenzoye) benzene and these synthesized bisphenol monomers. FTIR is used to characterize the structure of PEEKs. The thermal properties of the polymers are investigated by DSC and TGA. Due to the existence of pendant long chain in PEEKs, the T_g and the temperature of 5% mass loss decrease. The solubility of the polymer is improved. From these results, the relationships between their structures and properties are well established.

Key words: Poly(ether ether ketone)(PEEK), Bisphenol monomers with a long side chain, High-performance engineering thermoplastics