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The use of visible and ultraviolet spectroscopy to identify carbonyl compunds in photodegraded plastics
Author(s) -
Gray V. E.,
Wright J. R.
Publication year - 1965
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760050412
Subject(s) - acetic acid , materials science , cellulose , methyl methacrylate , methacrylate , organic chemistry , chemistry , polymer , copolymer , composite material
Abstract A method was developed for identifying certain carbonyl compounds formed in plastics during exposure to carbon‐ac or solar radiant energy. The reaction of aldehydes and certain ketones with phenylenediamines (o‐, m‐, p‐, and N, N‐dimethyl‐p‐) in glacial acetic acid was found to yield stable colored products whose transmittance spectra are charactersitic of the carbonyl compound. Similar colored products were also formed when exposed plastics were dissolved in acetic acid solutions of the diamine. A comparison of the spectra of solutions of the plastics with those from known carbonyl compounds facilitates identification. The method was applied to the identification of carbonyl compounds from photodegraded poly (methyl methacrylate) and cellulose acetatebutyrate.