1. Department of Polymer Engineering; Sahand University of Technology; P.O. Box 51335-1996 Tabriz Iran
2. Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; P.O. Box 15875-4413 Tehran Iran
3. School of Chemistry, University College of Science; University of Tehran; P.O. Box 14155-6455 Tehran Iran
4. Department of Chemical Engineering; University of Tehran; P.O. Box 14155-6455 Tehran Iran