Gas Permeability and the Microstructure of Polymers

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Abstract
1. The permeability to gas of high molecular-weight polymers is closely connected with the character of the interaction between separate links of adjacent macromolecules, which is governed by the form of the chain and the energy of the intermolecular bonds. 2. The magnitude of permeability increases with increases in the curvature of the principal-valence chains and in the dimensions of the side groups, decreases with increase in the energy of the intermolecular bonds, and is independent of the length of the main valence chains. 3. A comparison of the values of the activation energies and gas permeabilities of a series of polymers makes reasonable the assumption that the principal paths for the penetration of hydrogen molecules lie along the interface between the nonpolar groups of the macromolecular chains.

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