1. School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
2. Shandong Copolymer Silicone Technology Research Institute, Weifang 261000, P. R. China
3. School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu 273155, Shandong, P. R. China