1. School of Science and Technology and Research Center for Environment Friendly Polymers, Kwansei-Gakuin University, Sanda 669-1337, Japan; Polymer Designing and Processing Research Laboratories, Kaneka Corporation, Settsu 566-0072, Japan; Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute, Hisakata, Tempaku, Nagoya 468-8511, Japan; and The Procter & Gamble Company, 8611 Beckett Road, West Chester, Ohio 45069