Synthesis and Characterization of the tert-Butyl Ester of the Oxydianiline-Pyromellitic Dianhydride Polyamic Acid
Abstract
Novel tert-butyl esters of oxydianiline/pyromellitic dianhydride polyamic acid were prepared in good yield. The polymers were prepared with either meta or para repeating units. The cure behavior of these tert-butyl esters was studied by IR, MS, and TG analysis and was compared to that of both the parent polyamic acid and its methyl ester. It was found that a rapid deprotection of the tert-butyl group occurs at around 200 ⁰C with liberation of free polyamic acid. Consequently, the cure behavior at 200 ⁰C of the tert-butyl ester approaches that of the parent polyamic acid. Furthermore, the isomerism of the repeating units does not appear to have any detectable effect on the cure behavior of the polymer, although meta isomerism appears to enhance solubility of the polymer in organic solvents.
Recommended Citation
Houlihan, F. M., Bachman, B., Wilkins, C. W., & Pryde, C. A. (1989). Synthesis and Characterization of the tert-Butyl Ester of the Oxydianiline-Pyromellitic Dianhydride Polyamic Acid. Macromolecules, 22(12), pp. 4477-4483. American Chemical Society (ACS).
The definitive version is available at https://doi.org/10.1021/ma00202a017
Department(s)
Economics
International Standard Serial Number (ISSN)
0024-9297; 1520-5835
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1989 American Chemical Society (ACS), All rights reserved.
Publication Date
01 Dec 1989
