Two oxadiazole containing aromatic diamines were synthesized. The diamines were prepared by reaction of aminophenols with 2,5-bis(4-fluorophenyl)-4l3,4-oxadiazole in a polar aprotic solvent in the presence of potassium carbonate. Reaction of the resulting 2,5-bis(4-(aminophenoxy)phenyl)-1,3,4-oxadiazoles with dianhydrides gave a series of polymeric amic acids. Thermal treatment yielded poly(imide ether oxadazole) films which displayed good thermal stability, flexibility, and glass transition temperatures ranging from 241 to 344C. The dielectric constants of the films were characterized as a function of relative humidity.
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References
1.
[1] D. D. Denton, D. R. Day, D. F. Priore, S. D. Senturia, E. S. Anolick and D. Scheider,.y. Elec. Mater., 14, 119-136 (1985).
2.
[2] R. A. Larsen, IBM J. Res. Develop., 24, 268-268 (1980).
3.
[3] K. Mittal, Ed., Polyimides: Symhesis Characterization, and Applications, Vols 1 and 2, Plenum Press, New York (1984).
4.
[4] A. H. Frazer, High temperature resistant polymers, Polymer Reviews, John Wiley, New York, 1968, pp. 159-175.
5.
[5] J. G. Hilborn, J. W. Labadie and J. L. Hedrick, Macromolecules, 23, 2845-2845 (1990).
6.
[6] J. W. Connel and P. M. Hergenrother, Polym. Mater. Sci. Eng. Proc., 60, 527-527 (1989).
7.
[7] J. L. Hedrick and J. W. Labadie, Macromolecules, 21, 1883-1883 (1988).
8.
[8] J. W. Connel, P. M. Hergenrother and P. W. Wolf, Polym. Mater. SciL Eng. Proc., 63, 366-366 (1990).
9.
[9] F. W. Mercer, Polym. Mater. Sci. Eng. Proc., 66, 268-268 (1992).
10.
[10] L. W. Frost, G. M. Bowere, J. H. Freeman, H. A. Burgman, E. J. Traynor and C. R. Ruffing,. Polym. Sci. Al, 6, 215-233 (1968).
11.
[11] F. N. Hayes, B. S. Rogers and D. G. Ott, J. Am. Chem. Soc., 77,1850-1850 (1955).
12.
[12] F. W. Mercer and T. D. Goodman, High Perf. Polym., 3, 297-297 (1991).
