1. School of Chemical Engineering, College of Engineering; University of Tehran; Tehran 11155-4563 Iran
2. Department of Resin and Additives; Institute for Color Science and Technology; P.O. Box 16765-654 Tehran Iran
3. Leibniz Institute of Polymer Research Dresden; Hohe Strasse 6 Dresden D-01069 Germany
4. Chemistry Department; Sharif University of Technology; Tehran Iran