COMPETING REACTIONS FOR POLY(ARYL ETHER KETONE) SYNTHESIS .2. PREPARATION OF HIGH-MOLECULAR-WEIGHT POLYMER FROM HYDROQUINONE AND 1,3-BIS(4-CHLOROBENZOYL)BENZENE
A. Bhatnagar et al., COMPETING REACTIONS FOR POLY(ARYL ETHER KETONE) SYNTHESIS .2. PREPARATION OF HIGH-MOLECULAR-WEIGHT POLYMER FROM HYDROQUINONE AND 1,3-BIS(4-CHLOROBENZOYL)BENZENE, Polymer, 35(5), 1994, pp. 1111-1114
High molecular weight semicrystalline poly(aryl ether ketone)s have be
en prepare from hydroquinone and 1,3-bis(4-chlorobenzoyl)benzene in di
phenylsulfone and anhydrous potassium carbonate with or without toluen
e. The use of this solvent system, instead of a combination of dimethy
lacetamide, diphenylsulfone and toluene, results in the elimination of
S(RN)1 (radical nucleophilic, unimolecular substitution) processes an
d the formation of high molecular weight polymer takes place entirely
via S(N)AR (nucleophilic aromatic substitution) reactions.