01351nam a2200229Ia 4500003001000000005001700010040000900027245006200036490005700098520063100155650001300786650002100799650001400820650001300834700001300847700001900860700001100879700001600890700001800906856015600924008004101080MX-MdCICY20260521091041.0  cCICY10aBarrier films made with various lamellar block copolymers0 vJournal of Membrane Science, 270(1-2), p.13-21, 20063 aThe 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.14aBARRIERS14aBLOCK COPOLYMERS14aDIFFUSION14aLAMELLAE12aWang, J.12aDerocher, J.P.12aWu, L.12aBates, F.S.12aCussler, E.L.40uhttps://drive.google.com/file/d/1e3EodEkT4fRu9w8DKUq9mLKQXjguArrb/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d