Diffusion of Organic Liquids through Protective Equipment Polymers

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Authors
  1. De Kee, D.
  2. Chan Man Fong, C.F.
  3. Yuan, G.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN);Sherbrooke Univ, Sherbrooke QUE (CAN) Dept of Chemical Engineering
Abstract
In this report, we present the results of the permeation of acetone, dichloromethane and toluene through natural rubber, nitrile rubber and bromobutyl rubber at various temperatures and elongations. The temperature range for acetone and toluene is 273 K to 313 K and for dichloromethane is 273 K to 308 K. The elongation range is 0% to 40% for all cases. Three diffusion coefficients are defined and measured. For each solvent / rubber pair, the breakthrough time tb and the steady state flux Fs at each temperature and elongation are recorded. The curves of the flux F versus the time t are plotted. It was found that at a fixed temperature, the results of F versus t for all elongations follow a master curve. The experimental data can be fitted to the model proposed by Cohen and collaborators. It has been found that the steady state flux Fs is an increasing function of temperature and elongation. The breakthrough time tb is a decreasing function of temperature and elongation and follows an Arrhenius-type relation. A new phenomenon has been observed in the diffusion of toluene through all three rubber membranes at temperatures above 308 K. After the steady state has been reached, the flux suddenly fluctuates wildly.
Report Number
DRDC-SUFFIELD-CR-2009-223 — Contractor Report (Final report)
Date of publication
01 Jul 1998
Number of Pages
178
DSTKIM No
CA033694
CANDIS No
533055
Format(s):
Electronic Document(PDF)

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