1. a R&D Center, exax Inc. , 310 Gongdan-dong, Gumi-si , Gyeongbuk , Korea (ROK)
2. b Department of Polymer Science and Engineering , Kumoh National Institute of Technology, Gumi-si , Gyeongbuk , Korea (ROK)
3. c Department of Chemical Engineering , Daegu University , Gyeongbuk , Korea (ROK)