COPOLYMERIZATION OF ETHYLENE AND PROPYLENE BY CATIONIC SCANDIUM ALKYL CATALYST SYSTEM

Dan-feng Li; Shi-hui Li; Chun-ji Wu; Chang-guang Yao; Dong-mei Cui

doi:10.3724/SP.J.1105.2013.12414

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COPOLYMERIZATION OF ETHYLENE AND PROPYLENE BY CATIONIC SCANDIUM ALKYL CATALYST SYSTEM

Research Article | 更新时间：2021-03-19

- COPOLYMERIZATION OF ETHYLENE AND PROPYLENE BY CATIONIC SCANDIUM ALKYL CATALYST SYSTEM
- Acta Polymerica Sinica Issue 5, Pages: 649-653(2013)
- 作者机构：
  
  中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2013.12414
  CLC：
- Published：20 May 2013，
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Dan-feng Li, Shi-hui Li, Chun-ji Wu, Chang-guang Yao, Dong-mei Cui. COPOLYMERIZATION OF ETHYLENE AND PROPYLENE BY CATIONIC SCANDIUM ALKYL CATALYST SYSTEM. [J]. Acta Polymerica Sinica (5):649-653(2013)
DOI：

Dan-feng Li, Shi-hui Li, Chun-ji Wu, Chang-guang Yao, Dong-mei Cui. COPOLYMERIZATION OF ETHYLENE AND PROPYLENE BY CATIONIC SCANDIUM ALKYL CATALYST SYSTEM. [J]. Acta Polymerica Sinica (5):649-653(2013) DOI： 10.3724/SP.J.1105.2013.12414.

摘要

双烷基钪配合物LSc(CH2SiMe3)2 (L=(2

6-iPr2C6H3)NC(Me)CHPPh2N(2

6-Me2C6H3))在助催化剂[Ph3C]B(C6F5)4］的作用下能够高活性地催化乙烯和丙烯共聚.在反应温度30℃和乙烯与丙烯常压(1.0 105Pa)下聚合

共聚活性能够达到7.5105 g(PE)mol-1 h-1 (105Pa)-1.单体的竞聚率分别为rE=29.75 和 rP=0.015.13C-NMR和DSC分析表明所得到的乙丙共聚物是弹性体

且丙烯单体无规分布在共聚物链中.

Abstract

The scandium dialkyl complex LSc(CH2SiMe3)2 (L=(2

6-iPr2C6H3)NC(Me)CHPPh2N-(2

6-Me2C6H3)) activated with [Ph3C]B(C6F5)4］ could initiate ethylene and propylene copolymerization with high activity (7.5105g(PE)mol-1 h-1 (105Pa)-1) under the conditions of room temperature (30℃) and atomphere pressure (1.0 105 Pa).The influence of comonomer feed content and polymerization temperature on activity and the composition of the copolymers using LSc(CH2SiMe3)2/[Ph3C]B(C6F5)4］ catalytic system were investigated.An increase in the initial propylene feed content leads to the increase in the incorporated propylene content of the resulting copolymer.At 30℃

the highest activity and incorporation of propylene were achieved.Determination of the reactivity ratios shows a much high reactivity for ethylene (rE=29.75 and rP=0.015).The resultant copolymers are elastomers having random sequence distibution of the two monomeric units evidenced by 13C-NMR spectroscopy and DSC analyses.

关键词

稀土配合物乙烯丙烯共聚合

Keywords

Rare earth metal complexEthylenePropyleneCopolymerization

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Related Author

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Related Institution

State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology

State Key Laboratory of Effective Utilization of Chemical Resources, Key Laboratory of Carbon Fiber and Functional Polymers of Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology

University of Chinese Academy of Sciences

CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences

Department of Polymer Science and Engineering, University of Science and Technology of China

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