Synergistic Effects of the ZnCl2-SiCl4 Modified TiCl4/MgCl2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations

Wanna Phiwkliang; Bunjerd Jongsomjit; Piyasan Praserthdam

doi:10.1007/s10118-014-1380-6

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Synergistic Effects of the ZnCl2-SiCl4 Modified TiCl4/MgCl2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations

Updated：2021-06-21

- Synergistic Effects of the ZnCl2-SiCl4 Modified TiCl4/MgCl2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations
- Synergistic Effects of the ZnCl₂-SiCl₄ Modified TiCl₄/MgCl₂/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations
- Chinese Journal of Polymer Science 2014年32卷第1期页码：84-91
- Affiliations：
  
  Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
- Author bio：
  
  **Piyasan Praserthdam, E-mail: piyasan.p@chula.ac.th
- Funds：
  
  Dusadeepipat scholarship at Graduate school of Chulalongkorn University, the Thailand Research Fund (TRF);Higher Education Promotion and National Research University Development(AM1088A);office of the Higher Education Commission (CHE)
- DOI：10.1007/s10118-014-1380-6
  中图分类号：
- 收稿：2013-03-04，
  
  修回：2013-04-17，
  
  录用：2013-05-06，
  
  纸质出版：2014-01
- Accepted：
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Wanna Phiwkliang, Bunjerd Jongsomjit, Piyasan Praserthdam. Synergistic Effects of the ZnCl2-SiCl4 Modified TiCl4/MgCl2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations[J]. Chinese Journal of Polymer Science, 2014,32(1):84-91.

Wanna Phiwkliang, Bunjerd Jongsomjit, Piyasan Praserthdam. Synergistic Effects of the ZnCl₂-SiCl₄ Modified TiCl₄/MgCl₂/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations[J]. Chinese Journal of Polymer Science, 2014, 32(1): 84-91. DOI: 10.1007/s10118-014-1380-6.
Wanna Phiwkliang, Bunjerd Jongsomjit, Piyasan Praserthdam. Synergistic Effects of the ZnCl2-SiCl4 Modified TiCl4/MgCl2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations[J]. Chinese Journal of Polymer Science, 2014,32(1):84-91. DOI： 10.1007/s10118-014-1380-6.

Wanna Phiwkliang, Bunjerd Jongsomjit, Piyasan Praserthdam. Synergistic Effects of the ZnCl₂-SiCl₄ Modified TiCl₄/MgCl₂/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations[J]. Chinese Journal of Polymer Science, 2014, 32(1): 84-91. DOI: 10.1007/s10118-014-1380-6. DOI：

摘要

Abstract

The copolymerizations of ethylene with 1-hexene or 1-octene by using TiCl

/MgCl

/THF catalysts modified with different metal halide additives (ZnCl

SiCl

and the combined ZnCl

-SiCl

) were investigated based on catalytic activity and copolymer properties. It was found that the catalyst modified with mixed ZnCl

-SiCl

revealed the highest activities for both ethylene/1-hexene and ethylene/1-octene copolymerization. The increase in activities was due to the formation of acidic sites by modifying the catalysts with Lewis acids. Based on the FTIR measurements

the characteristic C—O—C peaks of the catalysts modified with metal halide additives were slightly shifted to lower wavenumber when compared to the unmodified catalyst. This showed that the modified catalysts could generate more acid sites in the TiCl

/MgCl

/THF catalytic system leading to an increase in activities as well as comonomer insertion (as proven by

C-NMR). However

Lewis acid-modifications did not affect the microstructure of the copolymers obtained. By comparison on the properties of copolymers prepared with the unmodified catalyst

it was found that polymers with ZnCl

and/or SiCl

modification exhibited a slight decrease in melting temperature

crystallinity and density. It is suggested that these results were obtained based on the different amount of

-olefins insertion

regardless of the types of Lewis acids and comonomer.

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