Premium
Aromatic poly(ester imide)s and poly(amide imide)s having 1,1′‐binaphthyl‐2,2′‐diyls in the main chain
Author(s) -
Song Naiheng,
Gao Lianxun,
Qiu Xuepeng,
Qi Wei,
Ding Mengxian
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000701)201:11<1148::aid-macp1148>3.0.co;2-q
Subject(s) - imide , polymer chemistry , polyimide , benzidine , glass transition , polyamide , ether , chemistry , polymer , amide , polymerization , materials science , organic chemistry , layer (electronics)
Two new 1,1′‐binaphthyl‐2,2′‐diyl‐based dianhydrides, i. e., 2,2′‐bis(3,4‐dicarboxybenzamido)‐1,1′‐binaphthyl dianhydride (BNDADA) and 2,2′‐bis(3,4‐dicarboxybenzoyloxy)‐1,1′‐binaphthyl dianhydride (BNDEDA), were synthesized and polymerized with various aromatic diamines to afford polyimides through the traditional two‐step method. The polyimides with inherent viscosities ranging from 0.27 to 0.70 dl·g –1 showed excellent solubilities in polar solvents such as DMAc, DMSO and NMP etc., except of the poly(ester imide) prepared from BNDEDA and benzidine. Poly(ester imide)s based on BNDEDA can also be readily dissolved in weakly polar solvents such as THF, CH 2 Cl 2 and CHCl 3 . The glass transition temperatures of these polyimides are in the range of 210–310°C; the 5% weight loss temperatures are in the range of 390–465°C in nitrogen and 384–447°C in air. These polymers form light yellow, tough films that were transparent above 365 nm. The effects of different flexible units attached in the 2‐ and 2′‐positions, i. e., amide, ester and ether, on the properties of the polyimides obtained are discussed.