

FOLLOWUS
a.Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600, Pessac, France
b.MFP Michelin, Centre de Technologie/Ladoux, 23 Place des Carmes Déchaux, 63040 Clermont-Ferrand cedex 9, France
carlotti@enscbp.fr
Received:15 July 2019,
Revised:2019-9-2,
Accepted:06 September 2019,
Online First:18 November 2019,
Published:2020-04
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Forens, A.; Roos, K.; Dire, C.; Gadenne, B.; Carlotti, S. Anionic polymerization of butadiene using lithium/potassium multi-metallic systems: influence on polymerization control and polybutadiene microstructure. Chinese J. Polym. Sci. 2020, 38, 357–362
Antoine Forens, Kevin Roos, Charlotte Dire, et al. Anionic Polymerization of Butadiene Using Lithium/Potassium Multi-metallic Systems: Influence on Polymerization Control and Polybutadiene Microstructure[J]. Chinese Journal of Polymer Science, 2020, 38(4): 357-362.
Forens, A.; Roos, K.; Dire, C.; Gadenne, B.; Carlotti, S. Anionic polymerization of butadiene using lithium/potassium multi-metallic systems: influence on polymerization control and polybutadiene microstructure. Chinese J. Polym. Sci. 2020, 38, 357–362 DOI: 10.1007/s10118-020-2355-4.
Antoine Forens, Kevin Roos, Charlotte Dire, et al. Anionic Polymerization of Butadiene Using Lithium/Potassium Multi-metallic Systems: Influence on Polymerization Control and Polybutadiene Microstructure[J]. Chinese Journal of Polymer Science, 2020, 38(4): 357-362. DOI: 10.1007/s10118-020-2355-4.
Thermal
mechanical
and viscoelastic properties of polybutadiene-based rubber materials are highly dependent on polybutadiene microstructure. The use of polar modifier in association with alkyllithium is a well-known method to obtain polybutadiene with a high vinyl content. Another approach is to use bimetallic initiating species such as alkyllithium combined to heavier alkali metal alkoxide (RONa
ROK…). The polymerization control is nevertheless not achieved and several parameters were found to influence it. Using bimetallic initiating systems based on alkyllithium and a potassium alkoxide
alkyllithium structure
initiator preformation time
and initiator composition were identified as parameters influencing the anionic polymerization process of butadiene and/or polybutadiene microstructure. In addition
the use of trimetallic systems based on alkyllithium
potassium alkoxide
and alkylaluminum was investigated in order to prevent side reactions regardless of the [K]/[Li] ratio and of the initiator preformation time.
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