The polymerization of divalent acyl-1,2,4-triazoles and diols/bisphenols afforded a series of aromatic, semiaromatic, and aliphatic polyesters. Compared with polymerization by transesterification, this polymerization proceeded irreversibly at relatively low temperature (<100 °C) without a metal catalyst. The reactivities of acyl-1,2,4-triazoles were thus comparable to acyl chlorides. On the other hand, higher crystallinity and lager masses of acyl-1,2,4-triazole caused technical problems, particularly for the synthesis of polyarylates. Nevertheless, solution polymerization was effective to prepare polyacrylates, particularly which could not be synthesized by interfacial polymerization.
- Yasuhiro Kohsaka
- Ichiro Mori
- Yoshikazu Kimura
