| 不对称二亚胺异双核钴镍催化剂的合成及乙烯聚合研究 |
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| 引用本文： | 孙天旭,王齐,范志强.不对称二亚胺异双核钴镍催化剂的合成及乙烯聚合研究[J].中国科学:化学,2011(2):328-340. |
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| 作者姓名： | 孙天旭 王齐 范志强 |
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| 作者单位： | 教育部高分子合成与功能构造重点实验室浙江大学高分子科学与工程学系; |
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| 摘 要： | 合成了不对称异双核钴镍催化剂MN5CoNi.该催化剂经AlEt3,MMAO,AlEt3/PhMe2NH]B(C6F5)4](B)或MMAO/B活化后用于乙烯聚合.异双核催化剂与相应的等摩尔双组分混合单核催化剂相比,以TEA作助催化剂时,异双核催化剂的Co和Ni中心的活性都远低于双组分混合体系,且Ni中心生成的聚乙烯含量低于双组分混合体系,异双核催化剂中的Co和Ni中心同时被抑制.以MMAO作助催化剂时,异双核催化剂的活性虽低于双组分混合体系,但是异双核催化剂中的两种金属中心的活性都有了较大的提高,且Ni中心生成的聚乙烯含量高于后者.同时考察了活性随时间变化,发现异双核催化剂中活性衰减比双组分混合体系慢,说明异双核体系中Co和Ni中心在MMAO活化下比双组分混合体系的金属中心更稳定.当以TEA/B作助催化剂时,异双核催化剂中Co和Ni中心的活性有所提高,但仍远低于双组分混合体系,且Ni中心生成的聚乙烯含量低于后者,说明Ni被选择性抑制.当使用MMAO/B作助催化剂时,结果与MMAO类似.
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| 关 键 词： | 异双核钴镍配合物 乙烯聚合 助催化剂 |
Synthesis of unsymmetric heterobimetallic cobalt and nickel complex and its performance in ethylene polymerization |
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| SUN TianXu,WANG Qi & FAN ZhiQiang MOE Key Laboratory of Macromolecular Synthesis , Functionalization.Synthesis of unsymmetric heterobimetallic cobalt and nickel complex and its performance in ethylene polymerization[J].Scientia Sinica Chimica,2011(2):328-340. |
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| Authors: | SUN TianXu WANG Qi & FAN ZhiQiang MOE Key Laboratory of Macromolecular Synthesis Functionalization |
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| Affiliation: | SUN TianXu,WANG Qi & FAN ZhiQiang MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China |
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| Abstract: | Unsymmetric heterobinuclear cobalt and nickel complex MN5CoNi was prepared.The complex was applied as catalyst for ethylene polymerization activated by AlEt3,MMAO,AlEt3/PhMe2NH]B(C6F5)4](B) and MMAO/B respectively.The performance of the heterobinuclear complex in ethylene polymerization was compared with the binary complexes(unN3Co+unN2Ni) of equivalent corresponding mononuclear complexes unN3Co and unN2Ni.When the complex MN5CoNi was activated by AlEt3,the ethylene polymerization activity of cobalt or ni... |
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| Keywords: | unsymmetric hetero-binuclear cobalt and nickel complex ethylene polymerization cocatalyst |
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