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Reactivity of polyamic acids in thermal cyclization

✍ Scribed by Andrzej Orzeszko; Andrzej Sikorski

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
253 KB
Volume
29
Category
Article
ISSN
0014-3057

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✦ Synopsis

The reactions of pyromellitic anhydride, 3,3,'4,4'-benzophenonetetracarboxylic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride, o,L-bis(N-2-giutaric anhydride) pyromellitimide, O,Lbis(N-2-succinic anhydride) pyromellitimide and 1,2,3,4-cyclobutanetetracarboxylic dianhydride with aniline and benzidine lead to amic and polyamic acid. Thermal cyclization of these compounds gives the corresponding imides and the process was studied by DSC. It was shown that aromatic imides form at lower temperatures than aliphatic. Molecular modelling was used to determine geometrical parameters and space structures of five-and six-membered aromatic and aliphatic imide rings.

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