Effect of synthesis conditions on the properties of poly(arylenephthalide ether)

The effect of synthesis conditions on the properties of poly (arylenephthalide ether) based on 4,4'-bis(3-chloro-3-phthalidyl)terphenyl and 1,4-diphenoxy benzene was studied. With increasing the intrinsic viscosity of poly(arylenephthalide ether), the activation energy of its thermal degradation increased. IR and UV spectroscopy studies demonstrate that a relatively low thermal stability of poly(arylenephthalide ether) samples prepared under severe conditions is related to the presence of defect fragments in polymer chains and to the formation of branched macromolecules.