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The near infrared spectra of some polyamic acid resins
Author(s) -
Crandall E. W.,
Johnson E. L.,
Smith C. H.
Publication year - 1975
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1975.070190325
Subject(s) - infrared , infrared spectroscopy , amide , amine gas treating , ultraviolet , absorption (acoustics) , spectral line , materials science , photochemistry , absorption band , chemistry , analytical chemistry (journal) , polymer chemistry , organic chemistry , optics , optoelectronics , composite material , physics , astronomy
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.