Z. X. Li, Jingwei Liu, S. Yang
Oct 1, 2006
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0
Influential Citations
20
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Journal
Journal of Polymer Science Part A
Abstract
A new kind of AB2 monomer, 4-[2,6-bis(3,4-diaminophenyl)pyridin-4-yl]benzoic acid, was synthesized, and several hyperbranched polybenzimidazoles (HPBIs) were prepared through self-polymerization followed by modification reactions with end-capping reagents such as 4-methyl benzoic acid and 3-[3,5-bis(trifluoromethyl)phenoxy] benzoic acid. The HPBIs had good solubility in strongly aprotic solvents, such as N-methyl-2-pyrrolidone, N,N′-dimethylformamide, N,N′-dimethylacetamide, and dimethyl sulfoxide. They also exhibited excellent thermal properties, with glass-transition temperatures of 318–381 °C and 10% weight loss in the range of 338–674 °C in nitrogen and 329–509 °C in air. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 5729–5739, 2006