1. 3M Company; St. Paul MN USA
2. Department of Polymer Engineering; University of Akron; Akron OH USA (Present address: SABIC, Mt Vernon, USA)
3. Department of Polymer Engineering; University of Akron; Akron OH USA (Present address: The Coca Cola Company, Atlanta, GA, USA)
4. Department of Materials & Mechanical Engineering; Purdue University; West Lafayette IN USA