1. School of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
2. Key Laboratory of Polymer Processing Engineering (South China University of Technology), Ministry of Education, Guangzhou, Guangdong 510641, P. R. China
3. Natural Resources Bureau of Qingzhen City, Qingzhen, Guiyang, Guizhou Province 551400, P. R. China
4. Guizhou Material Industrial Technology Institute, Guiyang, Guizhou 550014, P. R. China