[1
]Queen Mary, University of London, Department of Materials, Mile End Road, E1 4NS,
London, UK
[2
]Department of Materials Science and Eng. University of Ioannina, PO Box 1186, GR-45
110, Ioannina, Greece
[3
]Eindhoven University of Technology, Eindhoven Polymer Laboratories, PO Box 513, 5600
MB Eindhoven, The Netherlands