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Synthesis and properties of thermally reversible polyesters
Author(s) -
Yamanaka Toru,
Kanomata Akinori,
Inoue Toshihide
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200350907
Subject(s) - polyester , extender , materials science , polymer chemistry , thermoplastic , pyromellitic dianhydride , viscosity , composite material , polyimide , polyurethane , layer (electronics)
Thermally reversible polyesters were obtained by the ester formation reaction of thermoplastic polyesters with hydroxyl end groups and the diacid anhydride of tetra carboxylic acid as a thermally reversible chain extender. Typical example of the thermally reversible polyesters was obtained by the reaction of PBT (polyburylene terephthalate) and PMA (pyromellitic dianhydride). This material having twice as large molecular weight as the original PBT exhibited almost the same melt viscosity as the original. Also that thermally reversible chain extension reaction occurred without unfavorable side reaction such as cross‐linking. This material shows both good processability and superior mechanical properties due to its thermally reversible characters.