1. State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 P. R. China
2. Key Laboratory of Rubber-PlasticsMinistry of Education Qingdao University of Science & Technology Qingdao 266042 P. R. China
3. Department of Future Industry-Oriented Basic Science and MaterialsGraduate School of EngineeringToyota Technological Institute, Tempaku Nagoya 468-8511 Japan