Title

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.

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

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