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Copolyimides using 3‐phenyl tricyclo [6,2,2,0 2,7 ] dodeca‐2,11‐ene‐5,6,9,10‐tetracarboxylic dianhydride as a thermosetting functional group: Preparation, characterization, and thermal curing chemistry
Author(s) -
Su ChingYie,
Lee YuDer
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070441014
Subject(s) - thermosetting polymer , ene reaction , benzophenone , curing (chemistry) , polymer chemistry , solvent , materials science , thermal stability , chemistry , organic chemistry , composite material
Copolyimides were prepared by the reaction of 4,4‐oxydianiline (ODA) with two dianhydrides, namely, 3,3′,4,4′‐benzophenone tetracarboxylic dianhydride (BTDA) and 3‐phenyl tricyclo [6,2,2,0 2,7 ] dodeca‐2,11‐ene‐5,6,9,10‐tetracarboxylic dianhydride (PTDDA). ODA and BTDA first reacted in DMAc solvent, then following the addition of PTDDA, which was used as a thermosetting functional group in the polymer's backbone. Two homopolyimides prepared from the reaction of ODA with BTDA or PTDDA were also synthesized. The properties of homopolyimides such as solubility, thermal properties, and thermal curing mechanism were compared to those of copolyimides. The results showed that the tricyclic structure of the PTDDA unit underwent a reverse Diels‐Alder reaction at near 300°C and it controlled the thermal behaviors of copolyimides.