1. Macromolecular Chemistry Research Group (LABQUIMAC); Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU); Leioa 48940 Spain
2. Basque Center for Materials, Applications and Nanostructures (BCMaterials), Parque Tecnológico de Bizkaia; Ed. 500 Derio 48160 Spain
3. The Footwear Technology Center of La Rioja; Calle Raposal 65 Arnedo 26580 Spain