SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF<sub>3</sub>·CYCLOHEXANOL INITIATING SYSTEM

Lai-bao Zhang; Yi-xian Wu; Peng Zhou; Guan-ying Wu; Wan-tai Yang; Ding-sheng Yu

doi:10.1007/s10118-011-1042-x

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SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF₃·CYCLOHEXANOL INITIATING SYSTEM

Paper | Updated：2021-06-21

- SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF₃·CYCLOHEXANOL INITIATING SYSTEM
- Chinese Journal of Polymer Science Vol. 29, Issue 3, Pages: 360-367(2011)
- Affiliations：
  
  State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers (Ministry of Education), Beijing University of Chemical Technology, Beijing 100029, China
- Author bio：
  
  **Yi-xian Wu (吴一弦), E-mail: wuyx@mail.buct.edu.cn
- Funds：
- DOI：10.1007/s10118-011-1042-x
  CLC：
- Received：19 April 2010，
  
  Revised：2010-06-16，
  
  Accepted：02 July 2010，
  
  Published：2011
- Accepted：
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Lai-bao Zhang, Yi-xian Wu, Peng Zhou, et al. SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF₃·CYCLOHEXANOL INITIATING SYSTEM[J]. Chinese Journal of Polymer Science, 2011, 29(3): 360-367. DOI: 10.1007/s10118-011-1042-x.
DOI：

Lai-bao Zhang, Yi-xian Wu, Peng Zhou, et al. SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF₃·CYCLOHEXANOL INITIATING SYSTEM[J]. Chinese Journal of Polymer Science, 2011, 29(3): 360-367. DOI: 10.1007/s10118-011-1042-x. DOI：

摘要

Abstract

The selective cationic polymerization of isobutylene (IB) initiated by a BF

·cyclohexanol (CL) complex was carried out from the mixed C

fraction feed containing the 4C saturated and unsaturated hydrocarbons at -20℃. The effects of CL concentration

concentration

solvent for preparing BF

·CL complex and polymerization time on the chemical structure of end groups

number-average molecular weight (

) and molecular weight distribution (MWD

) of the resulting polymers were investigated. The experimental results indicate that the BF

·CL complex initiating system exhibited an extremely high selectivity toward the cationic polymerization of IB in the mixed C

fraction feed and low molecular weight (

= 900-3600) polyisobutylenes (PIBs) with large proportion of

exo

-double bond end groups were obtained. The

exo

-double bond content in PIB chain ends increased by increasing CL concentration or by decreasing solvent polarity in initiating system

concentration and polymerization time. The

and MWD of the resulting PIBs were dependent on the concentrations of CL and BF

. Highly reactive PIBs with around 90 mol% of

exo

-double bonds were successfully synthesized by the selective polymerization of IB from the mixed C

fraction feed

providing a potentially practical process for its simplicity and low costs.

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SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF3·CYCLOHEXANOL INITIATING SYSTEM

DOI：10.1007/s10118-011-1042-x

摘要

Abstract

关键词

Keywords

references

SYNTHESIS OF HIGHLY REACTIVE POLYISOBUTYLENES WITH BF₃·CYCLOHEXANOL INITIATING SYSTEM