1. Textile Engineering, Chemistry and Science, College of Textiles, North Carolina State University, PO Box 8301, Raleigh, NC 27695‐8301, USA;
2. Department of Textile Engineering, Yazd University, PO Box 89195‐74, Yazd, Iran
3. Department of Polymer Engineering, Amir Kabir University of Technology, PO Box 15875‐4413, Tehran, Iran