1. College of Polymer Science and Polymer Engineering, Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, Department of Materials Sciences and Engineering, Drexel University, Philadelphia, Pennsylvania 19014, Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, 561-756, Korea, and Institute Charles Sadron, CNRS, 6 Rue Boussingault, Strasbourg