1. State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
2. China National Tire and Rubber Co. Ltd.; Beijing 100080 China
3. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology; Beijing 100029 China
4. Department of Materials Science and Engineering; Virginia Polytechnic Institute and State University; Blacksburg Virginia 24060