Abstract:
The experimental data on the thermodynamics of the intramolecular cyclodehydration reactions of prepolymers in the solid phase are examined and treated systematically. The changes in the thermodynamic functions of the above processes have been analysed in detail over a wide temperature range. The temperature ranges corresponding to the formation of polyheteroarylenes which are "defect-free" to the maximum extent have been estimated. The bibliography includes 65 references.