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A novel zirconocene/ultradispersed diamond black powder supported catalytic system for ethylene polymerization |
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| Authors: | Youling Yuan Li WangLinxian Feng Kang XuJian Shen |
| Affiliation: | a College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China b Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, PR China c Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China |
| Abstract: | A novel carrier of ultradispersed diamond black powder (UDDBP) was used to support metallocene catalyst. Al2O3 was also used as carrier in order to compare with UDDBP. Supported catalysts for ethylene polymerization were synthesized by two different reaction methods. One way was direct immobilization of the metallocene on the support, the other was adsorption of MAO onto the support followed by addition of the metallocene. Four supported catalysts Cp2ZrCl2/UDDBP, Cp2ZrCl2/Al2O3, Cp2ZrCl2/MAO/UDDBP and Cp2ZrCl2/Al2O3/MAO were obtained. The content of the zirconium in the supported catalyst was determined by UV spectroscopy. The activity of the ethylene polymerization catalyzed by supported catalyst was investigated. The influence of Al/Zr molar ratio and polymerization temperature on the activity was discussed. The polymerization rate was also observed. |
| Keywords: | Ultradispersed diamond black powder Al2O3 Support metallocene Ethylene polymerization Polymerization rate |
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