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One‐step synthesis of aromatic polyimides based on 4,4′‐diaminotriphenylmethane
Author(s) -
Likhatchev D.,
Alexanrova L.,
Tlenkopatchev M.,
MartinezRicha A.,
VeraGraziano R.
Publication year - 1996
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/(sici)1097-4628(19960801)61:5<815::aid-app13>3.0.co;2-w
Subject(s) - nitrobenzene , condensation polymer , polyimide , glass transition , solubility , casting , materials science , polymer chemistry , chemical engineering , thermal stability , polymer , organic chemistry , chemistry , composite material , catalysis , layer (electronics) , engineering
The feasibility of using a one‐step high‐temperature polycondensation for the synthesis of aromatic polyimides, based on 4,4′‐diaminotriphenylmethane (DA‐TPM), was studied. It was found that the reaction of DA‐TPM with various aromatic dianhydrides in nitrobenzene at 180–200°C resulted in the formation of the high molecular weight soluble polyimides, PI‐TPM. The reaction solutions cooled to ambient temperature were used for casting films. These PI‐TPM films significantly exceeded their prototypes obtained by the thermal imidization of poly(amic acids) in terms of solubility and tensile properties. All studied polyimides demonstrated well‐distinguished glass transition at 260–320°C. © 1996 John Wiley & Sons, Inc.