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Evaluation of solvent resistivity of fluoropolymers for use as backup membranes in isocyanate samplers.

Authors
Rudzinski-W; Harlapur-SF; Aminabhavi-TM
Source
J Appl Polym Sci 1996 Dec; 62(10):1587-1595
Link
NIOSHTIC No.
20024572
Abstract
Four types of fluoroelastomer (VITON) membranes were tested for their resistivity toward dimethyl sulfoxide, dioxane, and toluene at 25, 45, and 60 degrees C, using a gravimetric method. Coefficients of diffusion and permeation were calculated from the sorption results. Analytical solutions of Fick's equation as well as a numerical method were used to calculate the concentration profiles of liquids in the membrane materials at different penetration depths and exposure times. Activation parameters for diffusion, permeation, and sorption were obtained from the Arrhenius equation. These membrane materials were evaluated for their ability to serve as a barrier to solvent permeation in a composite membrane sampler for the analytical determination of isocyanates generated during spray-painting operations.
Keywords
Toluenes; Occupational-exposure; Sampling; Sampling-methods; Solvents; Analytical-methods; Isocyanates; Spray-painting; Painting; Paint-spraying; Materials-testing
CODEN
JAPNAB
CAS No.
67-68-5; 123-91-1; 108-88-3
Publication Date
19961205
Document Type
Journal Article
Funding Amount
88710
Funding Type
Grant
Fiscal Year
1997
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003295
Issue of Publication
10
ISSN
0021-8995
Source Name
Journal of Applied Polymer Science
State
TX
Performing Organization
Southwest Texas State University, Department of Chemistry, San Marcos, Texas
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