Liquid crystalline polymers. VII. Polyethers based on 3,3-bis(chloromethyl)oxetane and various bisphenols with potential liquid crystalline behavior

The present paper studies the influence of the chain's chemical structure on the thermal behavior of some polyethers. The investigated polymers were synthesised by phase transfer catalysis using 3,3-bis(chloromethyl)oxetane and various bisphenols as monomers. The polymers were characterized by H-1-NMR spectroscopy, DSC technique and optical microscopy in polarized light. Theoretical conformational studies were also performed. Among the studied polymers, only those containing 4,4'-dihydroxyazobenzene and 4,4'-dihydroxybenzophenone can present liquid crystalline behavior. The copolyethers containing the 4,4'-dihydroxydiphenyl do not present liquid crystalline behavior.