ISSN:
0887-624X
Keywords:
thermo-oxidative stability
;
polyimide
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A series of aromatic diamines having ether and/or carbonyl moieties in their structures were synthesized. By using these synthesized diamines and commercially available tetracarboxylic dianhydrides, various kinds of polyimides having ether and/or carbonyl moieties were synthesized. The thermo-oxidative stability of the obtained polyimides was investigated by focusing on the chemical structures of their repeating structure units. The reason for the improved thermo-oxidative stability of the ether-carbonyl polyimide structure was explained by an electronically balanced condition, i.e., the balance of electron donor moiety ( - O - ) and electron acceptor moiety ( - CO - ) in a chemical structure, and the degree of electron deficiency of the benzene-imide ring structure. The possibility of the formation of a charge transfer complex (CT-complex) was also mentioned as an explanation of the improved thermo-oxidative stability of ether-carbonyl polyimide structures. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1717-1723, 1998
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
