ISSN:
0887-624X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Several new polyimides were prepared from the reaction of three aromatic dianhydrides with two new methyl substituted aromatic diamines containing carbonyl and ether connecting groups between the aromatic rings. The diamines were prepared from the reactions of 3-methyl-4-aminophenol and 3,5-dimethyl-4-aminophenol with 1,3-bis(4-fluorobenzoyl) benzene in the presence of potassium carbonate. The 300°C cured polyimides containing methyl substituents were shown to be armorphous by wide angle X-ray diffraction and exhibited glass transition temperatures between 231-281°C. The properties of these new polyimides containing methyl substituents were compared with polymides of the same chemical structure but without methyl substituents.
Additional Material:
5 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pola.1991.080291012
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