THE EFFECT OF INTERNAL ELECTRON DONOR ON ACTIVE COMPONENT TITANIUM IN MgCl2-SUPPORTED TiCl4 CATALYSTS

XUE Jun; GAO Mingzhi; LI Tianyi

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THE EFFECT OF INTERNAL ELECTRON DONOR ON ACTIVE COMPONENT TITANIUM IN MgCl2-SUPPORTED TiCl4 CATALYSTS

Research Article | 更新时间：2021-03-19

- THE EFFECT OF INTERNAL ELECTRON DONOR ON ACTIVE COMPONENT TITANIUM IN MgCl2-SUPPORTED TiCl4 CATALYSTS
- Acta Polymerica Sinica Issue 7, Pages: 927-930(2006)
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- Published：20 October 2006，
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XUE Jun, GAO Mingzhi, LI Tianyi. THE EFFECT OF INTERNAL ELECTRON DONOR ON ACTIVE COMPONENT TITANIUM IN MgCl2-SUPPORTED TiCl4 CATALYSTS. [J]. Acta Polymerica Sinica (7):927-930(2006)
DOI：

XUE Jun, GAO Mingzhi, LI Tianyi. THE EFFECT OF INTERNAL ELECTRON DONOR ON ACTIVE COMPONENT TITANIUM IN MgCl2-SUPPORTED TiCl4 CATALYSTS. [J]. Acta Polymerica Sinica (7):927-930(2006) DOI：

摘要

应用XPSI、R等表征手段研究了以MgCl2为载体

苯甲酸酯、邻苯二甲酸酯以及1

3-二醚为内给电子体的Ziegler-Natta(Z-N)催化剂中内给电子体对活性组分Ti的作用.实验结果表明

不同内给电子体Z-N催化剂中Ti的氧化状态是不同的

给电子体不与Ti直接发生作用

而是通过MgCl2为媒介向Ti发生电荷转移

造成Ti周围电子云密度增大

Ti的氧化状态降低

表现为Ti的结合能下降.

Abstract

The chemical states of titanium of TiCl4·donor

and MgCl2-supported Ziegler-Natta catalysts obtained by milling method and precipitation method

and the interactions between TiCl4

donor

and MgCl2 were studied by XPS and IR methods

and the electron binding energies of Ti2p3 in TiCl4·Mgcl2

TiCl4·donor and TiCl4·MgCl2·donor and the characteristic adsorption peaks of C＝O bond or c—O—c bend in MgCL2·donor

TiCL4·donor and TiCL4·MgCL2·donor were compared．The results showed that the oxidation states of titanium species in Ziegler-Nana catalysts using different compounds

such as benzoate

phthalate

3-diether as internal electron donors weRE different．The internal donor did not react directly on titanium

but transfered electron to titanium through MgcL2 as medium

and inereased the electron-cloud density of Ti species

and thus decreased the oxidation state and electron binding energy of Ti species．

关键词

Z-N催化剂内给电子体活性组分表征XPSIR

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