Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and <italic style="font-style: italic">i</italic>Bu<sub>3</sub>Al

Xiao Yin; Huan Gao; Fei Yang; Li Pan; Bin Wang; Zhe Ma; Yue-Sheng Li

doi:10.1007/s10118-020-2446-2

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Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu₃Al

ARTICLE | Updated：2020-06-09

- Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu₃Al
- Chinese Journal of Polymer Science Vol. 38, Issue 11, Pages: 1192-1201(2020)
- Affiliations：
  
  a.Tianjin Key Lab of Composite & Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
  b.Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Author bio：
  
  lilypan@tju.edu.cn
- Funds：
- DOI：10.1007/s10118-020-2446-2
  CLC：
- Received：12 February 2020，
  
  Revised：2020-4-7，
  
  Accepted：24 April 2020，
  
  Online First：09 June 2020，
  
  Published：14 August 2020
- Accepted：
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Yin, X.; Gao, H.; Yang, F.; Pan, L.; Wang, B.; Ma, Z.; Li, Y. S. Stereoblock polypropylenes prepared by efficient chain shuttling polymerization of propylene with binary zirconium catalysts and , i,Bu₃Al. Chinese J. Polym. Sci. 2020, 38, 1192–1201 DOI: 10.1007/s10118-020-2446-2.

Xiao Yin, Huan Gao, Fei Yang, et al. Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu₃Al[J]. Chinese Journal of Polymer Science, 2020, 38(11): 1192-1201. DOI: 10.1007/s10118-020-2446-2.
Yin, X.; Gao, H.; Yang, F.; Pan, L.; Wang, B.; Ma, Z.; Li, Y. S. Stereoblock polypropylenes prepared by efficient chain shuttling polymerization of propylene with binary zirconium catalysts and , i,Bu₃Al. Chinese J. Polym. Sci. 2020, 38, 1192–1201 DOI: 10.1007/s10118-020-2446-2. DOI：

Xiao Yin, Huan Gao, Fei Yang, et al. Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu₃Al[J]. Chinese Journal of Polymer Science, 2020, 38(11): 1192-1201. DOI: 10.1007/s10118-020-2446-2. DOI：

摘要

Abstract

Stereoblock polypropylenes bearing isotactic

atactic

and syndiotactic polypropylene segments were successfully prepared by dry methyl aluminoxane activated binary catalysts system

CFluCpZrCl

and {Me

Si(2

5-Me

-3-(2-MePh)-cyclopento[2

]thiophen-6-yl)

}ZrCl

in the presence of

Al as a chain shuttling agent. By studying the catalyst activity

chain transfer efficiency

and reversibility of chain transfer reaction of each catalyst system

as well as the molecular weight and polydispersity of the resulting polymers

the alkyl exchange reactions between the zirconium catalyst and different main-group metal alky were estimated

respectively. Based on the optimized react condition

the chain shuttling polymerization was conducted by binary catalyst system in the presence of

Al under both atmospheric and high pressure. Resultant polymers were identified as stereoblock polypropylenes according to microstructure and physical properties analyses by

H}-NMR

DSC

and GPC.

关键词

Keywords

references

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⁰

Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu3Al

DOI：10.1007/s10118-020-2446-2

摘要

Abstract

关键词

Keywords

references

Stereoblock Polypropylenes Prepared by Efficient Chain Shuttling Polymerization of Propylene with Binary Zirconium Catalysts and iBu₃Al