Abstract
New polyesters prepared by the intefacial polycondensation of 2,6-bis(4- hydroxybenzylidene )cyclohexanone (I) and 2,6-bis(4-hydroxy-3-methoxybenzylidene)- cyclohexanone (II) with 4,4'-diphenic, isophthalolyl, terephthaloyl, adipoyl and sebacoyl dichlorides have been produced. The yield and the values of reduced viscosity of the polyesters were found to be affected by the kind of organic phase, the quantitative ratio of organic to aqeuous phase, concentration of hydrogen chloride acceptor, rate of acid chloride addition, contribution of benzyltriethylammonium chloride as a catalyst and the temperature of the polycondensation reaction.
In order to characterize these polymers the necessary model compounds were prepared from I or II and benzoyl chloride. The resulting polyesters were characterized by IR, elemental analyses, viscometry, DTA, DSC measurements and thermogravimetric analy sis. The crystallinity of all polyesters was examined by X-ray analysis. In addition the electrical properties of the polyesters were investigated. The morphology of two new high performance polyesters namely poly[oxyisophthaloyloxy (2-methoxy-p-phenylene)methy lidyne(2-oxo-1,3-cyclahexanediylidene) methylidyne (3-methyoxy-p-phenylene)] and poly[oxysebacoyloxy(2-methoxy-p-phenylene)methylidyne(2-oxo-1,3-cyclohexanediyli dene)methylidyne(3-methoxy-p-phenylene)] has been investigated by transmission elec tron microscopy.
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