Barrier films made with various lamellar block copolymers

Junshan Wang, Jonathan P. DeRocher, Lifeng Wu, Frank S. Bates, E. L. Cussler

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The permeabilities of helium, nitrogen, and oxygen across lamellar block copolymers can be accurately estimated from the properties of the glassy and rubbery blocks. The copolymers tested include poly(styrene-b-isoprene-b-styrene) , poly(styrene-b-butadience-b-styrene), and poly(lactide-b-isoprene-b-lactide). The results show improvements in barrier properties that tend to be larger than those expected from the resistances of lamellae in series. These increases are not as large as those achieved with impermeable fillers like mica and clay. The changes in film elastic modulus caused by glassy lamellae are also discussed.

Original languageEnglish (US)
Pages (from-to)13-21
Number of pages9
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Feb 15 2006

Bibliographical note

Funding Information:
This work was largely supported by the Air Force Office of Scientific Research (grant F49620-01-1-0333). Other support came from the Department of Energy (grant DE-FG07-02ER63509), the Petroleum Research Fund (grant 39083-AC9), and the National Science Foundation (grant CTS 03225882).


  • Barriers
  • Block copolymers
  • Diffusion
  • Lamellae


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