Effect of microheterogeneities on the diffusion of gases through glassy polymers

✍ Scribed by J. A. Horas; E. R. Reyes; J. E. Magnin

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 395 KB
• Volume: 28
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/polb.1990.090280712

✦ Synopsis

Abstract

The diffusion of gases through glassy polymers is studied and the effective diffusion coefficient D^eff^ is represented as the result of the superposition of two fundamental mechanisms, namely slipping and hopping. D^eff^ is calculated by a two‐point correlation method. Comparisons are made with experimental data of Meares for diffusion coefficients of Kr, O~2~, He, and A in poly(vinyl acetate) in the glassy state. Good fits are obtained and yield significant parameters.