Citation: Guang-chun Zhang, Jun Zheng, Feng Liu, Zhi-jie Zhang, Li Ma, Tao Tang. Synthesis of Star-like Polybutadienes by a Combination of Living Anionic Polymerization and Click Coupling Method[J]. Chinese Journal of Polymer Science, ;2014, 32(6): 731-742. doi: 10.1007/s10118-014-1448-3 shu

Synthesis of Star-like Polybutadienes by a Combination of Living Anionic Polymerization and Click Coupling Method

Guang-chun Zhang ^1,2,3 ,
Jun Zheng ^1,2,3 ,
Feng Liu ^1,2,3 ,
Zhi-jie Zhang ^1,2,3 ,
Li Ma ⁴ ,
Tao Tang ⁴

1.
1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
2.
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
3.
4.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received Date: 26 August 2013
Revised Date: 9 December 2013

Fund Project: This work was financially supported by the National Natural Science Foundation of China for the projects (Nos. 51233005, 21004060 and 51073149).

Three-arm and four-arm star-like polybutadienes (PBds) were synthesized via the combination of living anionic polymerization and the click coupling method. Kinetic study showed that the click reaction between the azido group terminated PBd-t-N3 and the alkyne-containing multifunctional linking reagent was fast and highly efficient. All coupling reactions were fully accomplished within 40 min at 50 C in toluene in the presence of the reducing agent Cu(0), proven by 1H-NMR, FTIR and GPC measurements. For the coupling reactions between the PBd-t-N3 polymer and dialkyne-containing compound, the final conversion of the coupled PBd-PBd polymer was ca. 97.0%. When a PBd-t-N3 polymer was reacted with trialkyne-containing or tetraalkyne-containing compound, the conversion of three-arm or four-arm PBd was around 95.5% or 87.0%, respectively. Several factors influencing the coupling efficiency were studied, including the molecular weight of the initial PBd-t-N3, arm numbers and the molar ratio of the azido group to the alkynyl group. The results indicated that the conversion of the target products would be promoted when the molecular weight of the PBd-t-N3 was low and the molar ratio of the azido to alkynyl groups was close to 1.
- Polybutadiene,
- Living anionic polymerization,
- Click chemistry,
- Kinetic study,
- Coupling efficiency,
- Star-like
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