| 给电子体在丙烯聚合MgCl2载体催化剂体系中的作用 |
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| 引用本文： | 崔楠楠,张志成,李化毅,陈商涛,张晓帆,柯毓才,胡友良.给电子体在丙烯聚合MgCl2载体催化剂体系中的作用[J].高分子学报,2005(6):902-906. |
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| 作者姓名： | 崔楠楠 张志成 李化毅 陈商涛 张晓帆 柯毓才 胡友良 |
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| 作者单位： | 中国科学院化学研究所,高分子科学与材料联合实验室,工程塑料重点实验室,北京,100080;中国科学院研究生院,北京,100039;中国科学院化学研究所,高分子科学与材料联合实验室,工程塑料重点实验室,北京,100080 |
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| 基金项目： | 中国科学院资助研究项目（项目号KJCX2.SW-H07） |
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| 摘 要： | 制备了3种含有不同内给电子体(邻苯二甲酸二异丁酯,9,9-二甲氧基甲基-芴和1,1-双甲氧基甲基-环丁烷)的MgCl2负载型丙烯聚合齐格勒-纳塔(Z-N)催化剂,研究了给电子体结构与聚合性能之间的关系,用红外光谱剖析了催化剂及其相关化合物的结构,结果发现催化剂中的内给电子体直接与MgCl2配位,而没有与TiCl4结合.内给电子体的加入,降低了Z-N催化剂中钛的含量,提高催化丙烯聚合的活性,使聚合物的分子量分布变窄.聚合物立构规整度的变化强烈依赖于内给电子体的结构.
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| 关 键 词： | Ziegler-Natta催化剂 给电子体 丙烯聚合 |
| 收稿时间： | 2004-09-06 |
| 修稿时间： | 2004-10-22 |
ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS |
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| CUI Nannan,ZHANG Zhicheng,LI Huayi,CHEN Shangtao,ZHANG Xiaofan,KE Yucai,HU Youliang.ROLE OF ELECTRON DONOR IN THE POLYMERIZATION OF PROPYLENE WITH MgCl2-SUPPORTED CATALYSTS[J].Acta Polymerica Sinica,2005(6):902-906. |
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| Authors: | CUI Nannan ZHANG Zhicheng LI Huayi CHEN Shangtao ZHANG Xiaofan KE Yucai HU Youliang |
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| Institution: | 1. Key Laboratory of Engineering Plastics, Joint Laboratory of Polymer Science and Materials Institute of Chemistry, Chinese Academy of Sciences, Belling 100080;2. Graduate School of the Chinese Academy of Sciences, Belling 100039 |
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| Abstract: | MgCl_2-supported Ziegler-Natta(Z-N) catalysts containing three different Lewis bases(diisobutyl phthalate,9,9-bis(methoxymethyl) fluorine and 1,1bis(methoxymethyl) cyclobutane) as internal donors were prepared for propylene polymerization.The relationship between the structure of donors and the performance of catalysts were investigated.The Z-N catalyst containing 9,9-bis(methoxymethyl) fluorine as internal donor and the related compounds were characterized by FTIR spectroscopy.It was found that the internal donor in the MgCl_2/TiCl_4/Donor catalyst system was directly coordinated to MgCl_2.The introduction of internal donors decreased the Ti content in the catalyst system,increased the catalytic activity and narrowed the molecular mass distribution of polymers obtained.The stereospecificity of Z-N catalysts greatly depended on the structure of electron donors.A model of multi-active sites on heterogeneous Z-N catalyst was proposed to explain the experimental results. |
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| Keywords: | Propylene polymerization MgCl2-supported catalyst Lewis base |
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