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Incorporation of metal ions into polyimidesThe effects of the incorporation of metal ions into various polyimides on polyimide properties are investigated. Polyimide films derived from 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride (BDTA) 3,3'-diaminobenzophenone (m,m'-DABP), 4,4'-diaminobenzophenone (p,p'-DABP) or 4,4'-oxydianiline were prepared with the concurrent addition of approximately 20 metals in a variety of forms. In general, it is found that the films derived from BDTA + p,p'-DABP were brittle and of poor quality, with brittle films also produced in most of the BDTA + m, m'-DABP polyimides regardless of whether the added metal was hydrate or anhydrous. Thermomechanical analysis, torsional braid analysis, thermal gravimetric analysis, infrared spectral analysis and isothermal studies on many of the polyimide films produced indicate that the softening temperature is generally increased upon the addition of metal ions, at the expense of thermal stability, while no changes in chemical functionality are observed. The best system studied in regard to polymer property enhancement appears to be tri(acetylacetonato)aluminum(III) added to the m, m'-DABP polyamide, which has been found to exhibit four times the lap shear strength of the polyimide alone.
Document ID
19800062254
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Taylor, L. T.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Carver, V. C.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Furtsch, T. A.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Saint Clair, A. K.
(NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Chemistry And Materials (General)
Accession Number
80A46424
Distribution Limits
Public
Copyright
Other

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