Synthesis and Characterization of the t-Butyl esters of the Oxydianiline/Pyromellitic Dianhydride Polyamic Acid
Novel t-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 t-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 t-butyl group occurs at around 200°C with liberation of free polyamic acid. Consequently, the cure behavior at 200°C of the t-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.
Houlihan, F. M., Bachman, B., Wilkins, C. W., & Pryde, C. A. (1989). Synthesis and Characterization of the t-Butyl esters of the Oxydianiline/Pyromellitic Dianhydride Polyamic Acid. Polymeric Materials for Electronics Packaging and Interconnection, pp. 101-113. American Chemical Society (ACS).
The definitive version is available at https://doi.org/10.1021/bk-1989-0407.ch009
ACS Conference (1988: Sep. 25-30, Los Angeles, CA)
Article - Conference proceedings
© 1989 American Chemical Society (ACS), All rights reserved.
05 Sep 1989