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Polyimides derived from 1,4‐bis [3‐oxy‐( N ‐aminophthalimide)] benzene
Author(s) -
Li Taihang,
Yan Jingling,
Yang Huili,
Li Dongfeng,
Wang Zhen,
Ding Mengxian
Publication year - 2009
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.29488
Subject(s) - thermogravimetric analysis , diamine , benzene , glass transition , hydrazine (antidepressant) , polymer chemistry , condensation polymer , materials science , polyimide , dynamic mechanical analysis , polymer , thermal analysis , chemistry , organic chemistry , thermal , physics , chromatography , layer (electronics) , meteorology
A novel diamine, 1,4‐bis [3‐oxy‐( N ‐aminophthalimide)] benzene (BOAPIB), was synthesized from 1,4‐bis [3‐oxy‐( N ‐phenylphthalimide)] benzene and hydrazine. Its structure was determined via IR, 1 H NMR, and elemental analysis. A series of five‐member ring, hydrazine‐based polyimides were prepared from this diamine and various aromatic dianhydrides via one‐step polycondensation in p ‐chlorophenol. The inherent viscosities of these polyimides were in the range of 0.17–0.61 dL/g. These polymers were soluble in polar aprotic solvents and phenols at room temperature. Thermogravimetric analysis (TGA) showed that the 5% weight‐loss temperatures of the polyimides were near 450°C in air and 500°C in nitrogen. Dynamic mechanical thermal analysis (DMTA) indicated that the glass‐transition temperatures ( T g s) of these polymers were in the range of 265–360°C. The wide‐angle X‐ray diffraction showed that all the polyimides were amorphous. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009