1. Material Science Laboratory, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan
2. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
3. Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
4. School of Polymers and High Performance Materials, Shelby F. Thames Polymer Science Research Center, The University of Southern Mississippi, 118 College Drive, Hattiesburg, Mississippi 39406
5. Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15213