Summary
A titration method for quick and safe purification of solvents and monomers for anionic polymerization of styrene and dienes is presented. Protic impurities in the reaction-medium are removed by titration with butyllithium. The coloured carbanion of 4,5-methylenephenanthrene is used as an indicator to determine the end point of the titration. The titration is used in the synthesis of homopolymers and block copolymers of styrene and dienes with variable 1,2-polydiene content. Homopolymers and block copolymers in a large range of composition, molecular weight and with narrow molecular weight distribution were synthetized using the titration.
Similar content being viewed by others
References
Halasa A.F., Lohr D.F., Hall J.E., J. Polym. Sci., Polym. Chem. 19 (1981) 1357
Bywater S., Mackerron D.H., Worsfold D.J., Schué F. J. Polym. Sci., Polym. Chem. 23 (1985) 1997
Auschra C., Stadler R. Polymer Bulletin 30 (1993) 257
Lay R., diploma thesis Freiburg (1992)
Bandermann F., Speikamp H.-D., Weigel L. Makromol. Chem. 186 (1985) 2017
Nuguy T., Küçükyavuz S. Polymer International 29 (1992) 195
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sänger, J., Tefehne, C., Lay, R. et al. A simplified procedure of anionic polymerization of styrene and dienes using 4,5-methylenephenanthrene as an indicator. Polymer Bulletin 36, 19–26 (1996). https://doi.org/10.1007/BF00296003
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00296003