1. Department of Polymer Engineering; Islamic Azad University-Omidiyeh Branch; Omidiyeh; Iran
2. School of Chemical Engineering; College of Engineering; University of Tehran; Tehran; Iran
3. Department of Polymer Engineering; Islamic Azad University, Tehran South Branch; Tehran; Iran
4. Department of Resin and Additives; Institute for Color Science and Technology; P.O. Box: 16765-654; Tehran; Iran