Wenmu Li, Shenghai Li, Quanyuan Zhang
Oct 16, 2007
Citations
0
Influential Citations
50
Citations
Journal
Macromolecules
Abstract
Two novel bis(amine anhydride)s, N,N-bis(3,4-dicarboxyphenyl)aniline dianhydride (I) and N,N-bis(3,4-dicarboxyphenyl)-p-tert-butylaniline (II), were synthesized from the palladium-catalyzed amination reaction of N-methyl-protected 4-chlorophthalic anhydride with arylamines, followed by alkaline hydrolysis of the intermediate bis(amine−phthalimide)s and subsequent dehydration of the resulting tetraacids. The X-ray structures of anhydride I and II were determined. The obtained dianhydride monomers were reacted with various aromatic diamines to produce a series of novel polyimides. Because of the incorporation of bulky, propeller-shaped triphenylamine units along the polymer backbone, all polyimides exhibited good solubility in many aprotic solvents while maintaining their high thermal properties. These polymers had glass transition temperatures in the range of 298−408 °C. Thermogravimetric analysis showed that all polymers were stable, with 10% weight loss recorded above 525 °C in nitrogen. The tough polyme...