Pyrolysis-Gas Chromatography - A Method for Rapid Identification of Polymers.
Summary rept. Mar-Oct 72,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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A pyrolysis gas chromatography method for the rapid identification of organic polymers is described. Previous pyrolysis GLC studies have involved single flow systems and the identity of the small and large components of the pyrolyzate could not be determined simultaneously. The method described here makes use of a Chemical Data Systems Pyrochro which separates the pyrolyzate into a dual flow system equipped with thermal conductivity and flame ionization detectors. This arrangement permits the determination of both the small and large components present under optimum conditions. A linear temperature program is used to resolve the higher boiling components of the pyrolyzate in a reasonable time. The pyrograms obtained not only offer a fingerprint of the polymer, but also enable a detailed qualitative and quantitative analysis of the fragments of the pyrolyzate. The results of studies on some classes of elastomers, thermoplasts and fabrics are reported here. The polymer classes investigated include polyolefins, polyester, polyurethanes, polyethers, polyamides, phenolics, polycarbohydrates, epoxy resins and polycarbonates. Author-PL
- Polymer Chemistry