Trindade, A. C.Patricio, PTeixeira, P. I CBrogueira, PedroGodinho, M. H.2017-06-082017-06-082016-01-010531-7479PURE: 1267191PURE UUID: 8e57a39b-c639-4665-a700-c937b9906b76Scopus: 84958976077http://www.scopus.com/inward/record.url?scp=84958976077&partnerID=8YFLogxKRight now you are probably sitting on a comfy cushion. This is most likely filled with polyurethane (PU) foam. PUs are very long molecules made up of many repeating units. If the repeating units are prepolymers-intermediate-mass building blocks-with more than two reactive end groups, a three-dimensional network will form-a rubber, or elastomer, which can behave elastically depending on the degree of network cross-linking.5324904engGeneral Physics and Astronomyjournal article10.1051/epn/2016103https://www.scopus.com/pages/publications/84958976077