Abstract
A gas analytical system for measuring the evolved gases from materials during vacuum degassing is discussed. The outgassing data are based upon the throughput measurement and a computer‐controlled quadrupole mass spectrometer allows the determination of residual gas species. A variety of materials have been tested in the ‘‘as‐received’’ condition at room temperature vacuum exposure. Test results are presented for materials such as chlorinated polyvinylchloride (CPVC), low density carbon foam and Monel knitted wire mesh (both of which could be used for the attenuation of electromagnetic or radio frequency interference), polyethylene (in the form of black pipe, sheet of various thicknesses, and as an electrostatically applied coating to metal substrates), as well as Parylene‐N■ conformal coatings applied to CPVC, polyethylene, and stainless steel substrates.
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