1. School of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk, 361-763 South Korea, Saehan Industry Inc., Gumi, Kyungbook, 730-707 South Korea, and Polymer Branch, Materials & Manufacturing Directorate, AFRL/MLBP, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433