1. POLYMAT and Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
2. Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. Laboratory of Polymeric and Composite Materials, University of Mons-UMONS, Place du Parc 23, 7000 Mons, Belgium
4. University of Chinese Academy of Science, Beijing 100049, China
5. Department of Chemistry and Industrial Chemistry, University of Genova, 16146 Genova, Italy
6. IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain