光谱学与光谱分析 |
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UV/Visible Spectroscopic Study of the β-Diketonate Zirconium Active Species for Olefin Polymerization |
YANG Min1, WANG Lu-hai1, 2, LIU Pan-ge1, REN He-gang1, LIU Bin-yuan1*, YAN Wei-dong1 |
1. Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China 2. Daqing Chemical Engineering Research Center, the Petrochemical Research Institute, PetroChina, Daqing 163714, China |
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Abstract The method of UV/Visible absorption spectroscopy for olefin catalytic system was introduced in this paper, whose testing condition was much closer to the polymerization conditions. The actions of olefin polymerization catalyst (dbm)2ZrCl2 with cocatalyst AlEt2Cl (or MAO) were investigated by UV/visible absorption spectroscopy at atmosphere temperature. It was shown that the UV/Visible main absorption band of the zirconocenium, which can be related to the ligand to metal charge transfer bands (LMCT), varies greatly upon incremental addition of AlEt2Cl or MAO. For the low molar ratios of Al/Zr in the catalytic system, there was the substitution of an electron withdrawing chlorine atom by a donating alkyl group. Then a hypsochromic shift of the initial catalyst absorption band, corresponding to the monomethylation of the catalyst, was observed in each catalytic system (dbm)2ZrCl2/AlEt2Cl (or (dbm)2ZrCl2/MAO). On the contrary, further addition of AlEt2Cl (or MAO) was accompanied by a continuous bathochromic shift of the maximal wavelength, which corresponding to the formation of more dissociated ionic active species. Then, there would be a coordination of monomer to the ionic active species.
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Received: 2009-08-01
Accepted: 2009-11-06
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Corresponding Authors:
LIU Bin-yuan
E-mail: byliu@hebut.edu.cn
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[1] Coevoet D, Cramail H, Deffieux A. Macromol. Chem. Phys., 1998, 199: 1451. [2] Coevoet D, Cramail H, Deffieux A. Macromol. Chem. Phys., 1998, 199: 1459. [3] Pédeutour J-N, Coevoet D, Deffieux A, et al. Macromol. Chem. Phys., 1999, 200: 1215. [4] Peruch F, Cramail H, Deffieux A. Macromolecules, 1999, 32: 7977. [5] Ferreira M L, Belelli P G, Damiani D E. Macromol. Chem. Phys., 2001, 202: 495. [6] Pédeutour J-N, Radhakrishnan K, Cramail H, et al. Macromol. Rapid. Commun., 2001, 22: 1095. [7] Dalet T, Cramail H, Deffieux A. Macromol. Chem. Phys., 2004, 205: 1394. [8] Wieser U, Schaper F, Brintzinger H-H. Macromol. Symp., 2006, 236: 63. [9] Tritto I, Li S X, Sacchi M C, et al. Macromolecules, 1993, 26: 7111. [10] Tritto I, Li S X, Sacchi M C, et al. Macromolecules, 1995, 28: 5358. [11] Tritto I, Donetti R, Sacchi M C, et al. Macromolecules, 1999, 32: 264. [12] LUO He-kuan, YANG Zhi-hong, MAO Bing-quan, et al(罗河宽, 杨志洪, 毛炳权, 等). Acta Polymerica Sinica(高分子学报), 2001, (6): 720. [13] HU Jun-fu(胡军福). Chinese Journal of Spectroscopy Laboratory(光谱实验室), 2006, 23: 1026. [14] LIANG Guang, LIU Wei-ping, PU Shao-ping, et al(梁 广,刘伟平,普绍平, 等). Precious Metals (贵金属), 2004, 25: 12. [15] FAN Rui-lan, BAO Feng-rong, WANG Yong-sheng (范瑞兰, 宝凤荣, 王永升). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(4): 601. [16] YAN Wei-dong, HONG Han, ZHOU Nai, et al(闫卫东, 洪 翰, 周 鼐, 等). Acta Polymerica Sinica(高分子学报), 2000, (3): 358. [17] Wang J, Liu Z Y, Wang D, et al. Polymer International, 2000, 49: 1665. [18] YANG Min, SHEN Xiao-li, JI Rong-qin, et al(杨 敏, 沈小莉, 姬荣琴, 等). Polymer Materials Sciences and Engineering(高分子材料科学与工程), 2005, 21: 103, 109. [19] YANG Min, YAN Wei-dong, HAO Xiao-yu, et al. Macromolecules, 2009, 42: 905. [20] LI Run-qing, FAN Guo-liang, QU Rong-lin(李润卿, 范国梁, 渠荣遴). Spectral Analysis of Organic Structures(有机结构波谱分析). Tianjin: Tianjin University Press(天津: 天津大学出版社), 2002. 12.
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