Journal
POLYMER
Volume 45, Issue 10, Pages 3555-3564Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2004.03.024
Keywords
gas diffusion; glass transition; local mobility
Categories
Ask authors/readers for more resources
We performed molecular dynamics simulations on oxygen transport in dry and hydrated (with 3 and 13 wt% water content) amorphous ethylene-vinyl alcohol (EVOH) copolymers. As the water content increases, the intermolecular hydrogen bonding in the matrix decreases and the cavity sizes increase, which result in increased diffusion coefficients. The local chain mobility increases significantly only at 13% water content. The predicted glass transition temperatures fall into reported experimental ranges. The solubility coefficients of oxygen slightly decrease with increasing water content, which indicates that the excessive increase in permeability mainly results from increased diffusion rates. (C) 2004 Published by Elsevier Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available