is obtained in crystalline polymers regardless of the gases. Notably, better correlations are observed in the relationship between gas permeability and diffusivity than
the gas permeability and solubility. According to these results, the gas permeability
Fig. 7 Gas permeability for
(a) CO 2 , (b) N 2 , and (c) O 2 as
a function of gas diffusivity.
The represented symbols are:
crystalline polymers (●),
liquid crystalline polymers
(~), crystalline PET (■),
crystalline PEN (♦),
crystalline PS (▼), and
conventional amorphous
glassy polymers (○).
(Reprinted with permission
from J Membr Sci., 365, 40.
(Copyright (2010) Elsevier)
19 Gas Permeation and Barrier Properties of Liquid Crystalline Polymers
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