1. School of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 361-763, South Korea; University of Dayton Research Institute, 300 College Park Avenue, Dayton, Ohio 45469-0168; and Polymer Branch, Materials & Manufacturing Directorate, AFRL/MLBP, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433-7750