RT info:eu-repo/semantics/article T1 The influence of cell size on the mechanical properties of nanocellular PMMA A1 Martín de León, Judit A1 Van Loock, Frederik A1 Bernardo García, Victoria A1 Fleck, Norman A. A1 Rodríguez Pérez, Miguel Ángel AB Solid-state foaming experiments are conducted on three grades of polymethyl methacrylate (PMMA). Nanocellular PMMA foams are manufactured with an average cell size ranging from 20 nm to 84 nm and a relative density between 0.37 and 0.5. For benchmarking purposes, additional microcellular PMMA foams with an average cell size close to 1 μm and relative density close to that of the nanocellular foams are manufactured. Uniaxial compression tests and single edge notch bend tests are conducted on the PMMA foams. The measured Young's modulus and yield strength of the PMMA foams are independent of cell size whereas the fracture toughness of the PMMA foam increases with decreasing average cell size from the micron range to the nanometer range. SN 0032-3861 YR 2019 FD 2019 LK http://uvadoc.uva.es/handle/10324/40708 UL http://uvadoc.uva.es/handle/10324/40708 LA spa NO Polymer Volume 181, 24 October 2019, 121805 DS UVaDOC RD 19-abr-2024