1. Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, Náměsti T. G Masaryka, 762 72 Zlín, Czechia, Dipartimento di Chimica “G. Ciamician”, Universitá di Bologna, Via F. Selmi 2, 40126 Bologna, Italy and INSTM, UdR Bologna, Italy, and Department of Physics (IFM), Linköping University, 581 83 Linköping, Sweden