PYROLYSIS GAS CHROMATOGRAPHY/MASS SPECTROMETRY IDENTIFICATION OF ELASTOMERIC MATEIALS

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Authors
  1. Hiltz, J.A.
  2. Power, J.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Elastomers and thermoset polymers can be difficult to identify as a result of their cross-linked structure. Techniques such as transmission infrared spectroscopy have limited application to these materials because of difficulty in preparing thin films. Surface infrared techniques including multiple internal reflectance and total attenuated reflectance are more useful but their application can be hampered by the presence of additives such as carbon and plasticizers. Pyrolysis coupled with gas chromatographic separation and mass spectrometric identification of degradation provides a rapid reproducible method of degrading cross-linked materials and identifying their degradation products. As the degradation products are related to the structure of the polymer, these can be used to identify the polymer. In this paper, the pyrolysis products of samples natural rubber, butyl rubber, polychloroprene rubber, and three samples of polyacrylonitrile-butadiene rubber are studied to identify degradation products that are characteristic of each type of elastomer. Knowledge of characteristic degradation products allows the rapid, unambiguous identification of elastomer types. This information is critical in the selection of elastomers for use in a particular application or in determining why an elastomer failed in a particular environment.
Keywords
Thermoset polymers;Nitrile rubber
Report Number
DREA-TM-95-216 — Technical Memorandum
Date of publication
01 Jun 1995
Number of Pages
26
DSTKIM No
95-03768
CANDIS No
152848
Format(s):
Document Image stored on Optical Disk;Hardcopy

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