1. Polymer Science and Engineering, School of Materials Science and Engineering; Gyeongsang National University; Jinju Gyeongnam 660-701 Republic of Korea
2. Key Laboratory of Rubber-Plastics, Ministry of Education, College of Polymer Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
3. Department of Materials Science, Faculty of Science; Chulalongkorn University; Bangkok 10330 Thailand