NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Permeation Resistance of Personal Protective Equipment Materials to MonomethyhydrazinePermeation resistance was determined by measuring the breakthrough time and time-averaged vapor transmission rate of monomethylhydrazine (MMH) through two types of personal protective equipment (PPE). The two types of PPE evaluated were the totally encapsulating ILC Dover Chemturion Model 1212 chemical protective suit with accessories, and the FabOhio polyvinyl chloride (PVC) splash garment. Two exposure scenarios were simulated: (1) a saturated vapor exposure for 2 hours (h), and (2) a brief MMH 'splash' followed by a 2-h saturated vapor exposure. Time-averaged MMH concentrations inside the totally-encapsulating suit were calculated by summation of the area-weighted contributions made by each suit component. Results show that the totally encapsulating suit provides adequate protection at the new 10 ppb Threshold Limit Value Time-Weighted Average (TLV-TWA). The permeation resistance of the PVC splash garment to MMH was poorer than any of the totally encapsulating suit materials tested. Breakthrough occurred soon after initial vapor or 'splash' exposure.
Document ID
19970017917
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Waller, J. M.
(Allied-Signal Technical Services Corp. Las Cruces, NM United States)
Williams, J. H.
(White Sands Test Facility Las Cruces, NM United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1997
Publication Information
Publication: The 1997 JANNAF Propellant Development and Characterization Subcommittee and Safety and Environmental Protection Subcomittee Joint Meeting
Volume: 1
Subject Category
Nonmetallic Materials
Accession Number
97N20028
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available