1. POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry; University of the Basque Country UPV/EHU; Paseo Manuel de Lardizabal 3 Donostia-San Sebastián 20018 Spain
2. EDF, Research Engineer in Polymers and Advanced Materials, EDF R&D, Materials and Mechanics of Components Department, Site des Renardières; Avenue des Renardières-Ecuelles Moret sur Loing Cedex 77818 France
3. Physics Department; Simón Bolívar University; Valle de Sartenejas Apartado Caracas 89000 Venezuela
4. Chemical and Environmental Engineering Department; Polytechnic College of Donostia, University of the Basque Country UPV/EHU; Plaza de Europa 1 Donostia-San Sebastian 20018 Spain
5. IKERBASQUE, Basque Foundation for Science; Bilbao Spain