1. Laboratory of Polymer Chemistry and Technology; Chemistry Department; Aristotle University of Thessaloniki; 54124 Thessaloniki Greece
2. Laboratory of Polymeric Materials; Department of Materials Science and Engineering; University of Ioannina; Administration Building, University Campus Dourouti 45110 Ioannina Greece
3. Laboratory of Industrial and Food chemistry; Chemistry Department; University of Ioannina; P. O. Box 1186 45110 Ioannina Greece