Skip to main content
Log in

Anionic copolymerization of butadiene and isoprene: Applicability of the terminal model to high conversion

  • Published:
Polymer Bulletin Aims and scope Submit manuscript

Summary

The compositions of copolymers of butadiene (B) and isoprene (I), produced by anionic copolymerization with sec-butyl lithium initiator in hexane at 20–40°C gave a good fit at low conversions to the terminal model for copolymerization. Non-linear, “best estimates” of the reactivity ratios rB and rI were 2.82 and 0.42, 1.72 and 0.36, 2.18 and 0.35 at 20, 30 and 40°C. The rates of copolymerization at conversions up to 98% of total monomer gave a smooth relationship with the instantaneous feed composition, calculated using the terminal model, at each temperature and independent of the initial feed composition. These results are in accord with the terminal model being applicable to this anionic copolymerization from low to hiqh conversions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • CAIS, R.E., FARMER, R.G., HILL, D.J.T. and O'DONNELL, J.H.: Macromolecules 12, 835 (1979).

    Google Scholar 

  • KOROTKOV, A.A. and CHESNOKOVA, N.N.: Vysokomol. Soedin. 2, 365 (1960); Polym.Sci.USSR 2, 284 (1962).

    Google Scholar 

  • KOROTKOV, A.A. and RAKOVA, G.V.: Vysokomol.Soedin. 3, 1482 (1961); Polvm.Sci.USSR 3, 990 (1962).

    Google Scholar 

  • MORTON, M. and FETTERS, L.J.: Rubber Chem.Tech. 48, 359 (1975).

    Google Scholar 

  • NOSHAY, A., MCGRATH, J.E.: Block Copolymers: Overview and Critical Survey, New York: Academic Press, 1977.

    Google Scholar 

  • RAKOVA, G.V. and KOROTKOV, A.A.: Dokl.Akad.Nauk SSSR 119, 982 (1958); Chem.Abstr. 53, 4809 (1959).

    Google Scholar 

  • WANG, I.C., MOHAJER, Y., WARD, T.C., WILKES, G.L. and McGRATH, J.E.: in Anionic Polymerization: Kinetics, Mechanisms and Synthesis, McGrath, J.E. Ed., ACS Symposium Series No.166, Washington: Amer.Chem.Soc., 1981, p.529.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hill, D.J.T., O'Donnell, J.H., O'Sullivan, P.W. et al. Anionic copolymerization of butadiene and isoprene: Applicability of the terminal model to high conversion. Polymer Bulletin 9, 292–298 (1983). https://doi.org/10.1007/BF00262721

Download citation

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00262721

Keywords

Navigation