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The near infrared spectra of some polyamic acid resins

✍ Scribed by E. W. Crandall; E. L. Johnson; C. H. Smith

Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 369 KB
Volume: 19
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1975.070190325

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✦ Synopsis

Abstract

The absorption spectra of a series of polyamic acids prepared using various reaction conditions were studied using the ultraviolet (UV), visible, and near‐infrared (IR) ranges. The near‐IR proved most valuable; the amidization and imidization processes could be followed by observing the change of intensities of the 1950‐nm combination amine band and a band at 2300 nm assumed to be a function of the amide group.

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