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Preparation and evaluation of polyurethane foam/rubber membrane-based samplers for use in isocyanate sampling.

Authors
Rudzinski-WE; Yin-J; Anderson-T; Norman-S; Unnikrishnan-G; Varkey-JT; George-SC; Thomas-S; Aminabhavi-TM
Source
Polym-plast Technol Eng 1998 Jan; 37(1):103-113
NIOSHTIC No.
20024574
Abstract
In order to collect isocyanate in both aerosol and vapor forms, we have developed a dual-membrane sampler which features a moist porous bed, backed up by an impermeable membrane. A polyester-polyurethane foam (PUF) was selected to function as the porous bed, and it was evaluated for its ability to resist solvent degradation and swelling while permitting rapid air penetration. Natural rubber (NR) and styrene-butadience rubber (SBR) membranes were prepared to serve as backup membranes. These were also evaluated for their solvent compatibitility and air-penetration characteristics. A polyester-polyurethane foam backed up by a NR membrane prepared by an efficient vulcanization procedure was selected as the best combination for development of the isocyanate sampler. Recovery studies using the hexamethylene-based polyisocyanate, biuret, indicated better than 80% recovery of polyisocyanate after application to the PUF.
Keywords
Occupational-exposure; Sampling; Sampling-methods; Solvents; Analytical-methods; Isocyanates; Polyurethane-foams; Vapors; Aerosols; Styrenes; Air-sampling; Sampling-equipment
CODEN
PPTEC7
CAS No.
100-42-5; 822-06-0; 108-19-0
Publication Date
19980101
Document Type
Journal Article
Funding Amount
88710
Funding Type
Grant
Fiscal Year
1998
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003295
Issue of Publication
1
ISSN
0360-2559
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Polymer-Plastics Technology and Engineering
State
TX
Performing Organization
Southwest Texas State University, Department of Chemistry, San Marcos, Texas
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