Phenols/Al(C6F5)3Initiation Systems for Cationic Polymerizations of Isobutylene

Ling Cai; Qi-Yuan Wang; Xin-Li Liu; Dong-Mei Cui

doi:10.1007/s10118-022-2828-8

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Phenols/Al(C₆F₅)₃Initiation Systems for Cationic Polymerizations of Isobutylene

RESEARCH ARTICLE | Updated：2023-04-21

- Phenols/Al(C₆F₅)₃Initiation Systems for Cationic Polymerizations of Isobutylene
- Chinese Journal of Polymer Science Vol. 41, Issue 5, Pages: 713-719(2023)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  xlliu@ciac.ac.cn(X.L.L.)
  dmcui@ciac.ac.cn(D.M.C.)
- Funds：
- DOI：10.1007/s10118-022-2828-8
  CLC：
- Received：02 June 2022，
  
  Revised：2022-6-20，
  
  Accepted：21 June 2022，
  
  Online First：16 September 2022，
  
  Published：01 May 2023
- Accepted：
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Cai, L.; Wang, Q. Y.; Liu, X. L.; Cui, D. M. Phenols/Al(C₆F₅)₃initiation systems for cationic polymerizations of isobutylene.Chinese J. Polym. Sci.2023,41, 713–719 DOI: 10.1007/s10118-022-2828-8.

Ling Cai, Qi-Yuan Wang, Xin-Li Liu, et al. Phenols/Al(C₆F₅)₃Initiation Systems for Cationic Polymerizations of Isobutylene[J]. Chinese Journal of Polymer Science, 2023, 41(5): 713-719. DOI: 10.1007/s10118-022-2828-8.
Cai, L.; Wang, Q. Y.; Liu, X. L.; Cui, D. M. Phenols/Al(C₆F₅)₃initiation systems for cationic polymerizations of isobutylene.Chinese J. Polym. Sci.2023,41, 713–719 DOI: 10.1007/s10118-022-2828-8. DOI：

Ling Cai, Qi-Yuan Wang, Xin-Li Liu, et al. Phenols/Al(C₆F₅)₃Initiation Systems for Cationic Polymerizations of Isobutylene[J]. Chinese Journal of Polymer Science, 2023, 41(5): 713-719. DOI: 10.1007/s10118-022-2828-8. DOI：

摘要

The simple binary systems of (

PhOH)/Al(C

)

are facile for the preparation of PIBs with moderate and/or high molecular weights under mild experimental conditions (toluene solvent and high temperature from −20 °C to 0 °C).

Abstract

We report herein the cationic polymerization of isobutylene (IB) under mild conditions is realized with a new binary initiation system generated by simply mixing a Lewis super acid Al(C

)

and a substituted phenol (

PhOH

). Polymers with medium and/or high molecular weights (

=4.9×10

−27.7×10

g·mol

−1

) can be obtained in toluene and temperatures from −20 °C to 0 °C. NMR spectrum analysis and DFT simulation reveals the

in situ

generated acidic coordinating complex

Al(C

)

PhOH

is the initiating active species

which further transformed into the ion-pair

[Al(C

)

Ph]

−

[PIB]

of the active intermediates upon growing IB monomers where the counter anion

[Al(C

)

OPh]

−

coordinates to the macrocation

via

the phenoxy oxygen. The catalyst performances are the concert effects of the steric bulkiness and electronics of the counter anion on the coordinating strength to the macrocation

which is significant to the stability of the active species.

关键词

Keywords

references

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