Abstract
Permeation across thin films can be retarded when the films contain aligned flakes of a less permeable material, but aligning these flakes can be difficult. In this research, we measure transport across less permeable flakes which self-assemble from a triblock copolymer. Elasticity is most influenced by an isoprene block but permeability is dominated by a lactide block. The permeability of this lamellar composite for helium, oxygen, and nitrogen is about 20% smaller than that expected from estimates based on resistances in series, implying good alignment. However, the permeability of the triblock is still around 10-7 cm2/s, so that better barriers will require different polymers.
Original language | English (US) |
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Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Journal of Membrane Science |
Volume | 259 |
Issue number | 1-2 |
DOIs | |
State | Published - Aug 15 2005 |
Keywords
- Barrier films
- Permeability
- Triblock copolymer