Nanoporous Membranes: Nanowrinkled and Nanoporous Polyethylene Membranes Via Entanglement Arrangement Control (Adv. Funct. Mater. 10/2012)



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Molecular entangling of polymeric chains is considered a negative characteristic that restricts crystallization and results in inferior physical properties. On page 2048, Hiroki Uehara and co-workers demonstrate that using melt-drawing and subsequent melt-shrinking techniques allows for control of the entanglement positions of ultrahigh molecular weight polyethylene, resulting in a homogeneous lamellar morphology, similar to block copolymers. Such entanglement control also enables the preparation of nanoporous, but large-area, membranes without any solvent processing.