1. Analytical Technology Laboratory, R & D Center, Mitsubishi Chemical Corpolation, 1, Toho-cho, Yokkaichi, Mie 510-8530, Japan
2. Depaertment of Materials Science and Technology, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
3. Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan