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Motivation for studying diffusion in
polymers
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Sorption Isotherm on PET at 25 C
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Solubility and diffusivity of gasses in
rubber
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Permeability of gases in rubber
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Permeability of gasses in various
polymers
1 Barrer = 10-11 (cm3 O2 ) cm cm-2 s-1
mmHg-1. or 1 Barrer = 10-10 (cm3 O2 )
cm cm-2 s-1 cmHg-1. Here 'cm3 O2'
represents a molar quantity of
oxygen rather than a true volume. It
represents the quantity of oxygen
that would take up one cubic
centimeter at standard temperature
and pressure, as calculated via the
ideal gas law.
The 'cm' represents the thickness of
the material whose permeability is
being evaluated, and cm-2 is the
reciprocal of the surface area of that
material.
1 Barrer = 846 millilitre . mm / (cm2 .
day. bar(a))
1 Barrer = 3.348 x 10-19 kmol m /
(m2 s Pa)
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