Opening Pores and Extending the Application Window: Open‐Cell Nanocellular Foams

The production of open-cell (OC) nanostructures in polymer foams without non-foamed solid skins by gas dissolution foaming has been developed this work. First, several grades MAM block copolymer (methyl methacrylate-b-butyl acrylate-b-methyl methacrylate) at high content are employed as heterogeneous phase poly(methyl for producing OC structures. Atomic force microscopy and extensional rheology used methods to understand the main features obtain nanocellular Second, diffusion barrier approach is first time blends avoid appearance borders, which typically appears when cellular produced foaming. influence poly(vinyl alcohol) analyzed, together with effect nucleation provided copolymer, on skins’ formation. synergy between both approaches allows obtaining porous polymeric films an structure non-constrained presence outer skins.