1. a Department of Polymer Science and Engineering, Sungkyunkwan University, South Korea
2. b Department of Polymer Science and Engineering, Sungkyunkwan University, South Korea
3. c Department of Polymer Science and Engineering, Sungkyunkwan University, South Korea
4. d Huyndai-motors Company, South Korea
5. e Korea Institute of Industrial Technology, South Korea
6. f Sogang University, South Korea
7. g Department of Polymer Science and Engineering, Sungkyunkwan University, South Korea