1. Department
of Polymer Science and Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Republic of Korea
2. Department
of Polymer Engineering, Pukyong National University, 365 Sinseon-ro, Nam-gu, Busan, Yeongnam 608-739, Republic of Korea