Mass Spectroscopic Analysis of Polyether and Polyurethane Foam Plastics Degeneration in the SPH-4 Helmet

Two components of plastic manufacture, n-butyl-phthalate and ethyl-methyl ketone, have been found in high concentrations contained in the low gaseous transfer coefficient polyethylene protective bag for the SPH-4 aviator helmet. These agents are the cause of the deterioration of the SPH-4 helmet pol...

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Bibliographic Details
Main Authors: McNeil,Roderick J, Pettyjohn,Frank S
Format: Report
Language:English
Subjects:
BAGS
DETERIORATION
ETHYL RADICALS
EXPANDED PLASTICS
FLIGHT HELMETS
FOAM
GAS CHROMATOGRAPHY
KETONES
MASS SPECTROSCOPY
METHYL RADICALS
PHTHALATES
POLYETHERS
POLYETHYLENE PLASTICS
Polymer Chemistry
POLYURETHANE RESINS
Protective Equipment
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Summary:Two components of plastic manufacture, n-butyl-phthalate and ethyl-methyl ketone, have been found in high concentrations contained in the low gaseous transfer coefficient polyethylene protective bag for the SPH-4 aviator helmet. These agents are the cause of the deterioration of the SPH-4 helmet polyether and polyurethane foam lining material. The use of mass spectrographic and gas chromatographic techniques provided the sampling of chemical compounds contained within the polyethylene bag. The solution to prevent foam liner deterioration is to remove the SPH-4 helmet from the protective bag. (Author)