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Living carbocationic polymerization

VIII. Telechelic polyisobutylenes by the MeO(CH3)2C-p-C6H4-C(CH3)2OMe/BCl3 initiating system

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Summary

The efficient synthesis of symmetrical telechelic polyisobutylenes carrying ∼ CH2C(CH3)2Cl groups at either end of the molecule,\(\mathop - \limits^t Cl - PIB - Cl\mathop - \limits^t\), has been accomplished by rapid living polymerization using aromatic di-tert.-ether/BCl3 initiator system in CH3Cl at −70°. The living nature of the polymerization was demonstrated by linear Mn versus amount of PIB formed (WPIB) plots starting at the origin. The effect of temperature and solvent composition (polar/nonpolar) on the polymer structure has been investigated. Undesirable indanyl end groups which form during polymerizations carried out at −30° and −50°C can be eliminated by decreasing the temperature to −70°C. The apparent activation energy differences have been determined in the −30 to −70°C range at different polar/nonpolar solvent compositions: ΔEa of\(\mathop - \limits^t Cl - PIB - Cl\mathop - \limits^t\) decreases from 2.6 to 1.0 kcal/mole by decreasing the polarity of the medium from 100% CH3Cl to a 60/40 v/v CH3Cl/hexanes mixture.

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References

  1. M. K. Mishra and J. P. Kennedy, J. Macromol. Sci. Chem., in press

  2. R. Faust and J. P. Kennedy, Polym. Bull.15, 317 (1986), J. Polym. Sci., in press

    Google Scholar 

  3. J. P. Kennedy and R. A. Smith, J. Polym. Sci., Polym. Chem. Ed.18, 1523 (1980)

    Google Scholar 

  4. M. K. Mishra, B. Sar-Mishra, and J. P. Kennedy, Macromol. Syn.,10, in press (1986)

  5. V.S.C. Chang, J. P. Kennedy, and B. Iván, Polym. Bull.3, 339 (1980)

    Google Scholar 

  6. M. K. Mishra, B. Sar-Mishra, and J. P. Kennedy, Polym. Bull.13, 435 (1985)

    Google Scholar 

  7. J. P. Kennedy, V.S.C. Chang, R. A. Smith and B. Iván, Polym. Bull.1, 575 (1979)

    Google Scholar 

  8. A. Fehérvári, J. P. Kennedy, and F. Tüdös, J. Macromol. Sci.-Chem.,A15(2), 215 (1981)

    Google Scholar 

  9. A. Nagy, Polym. Bull.,14, 259 (1985)

    Google Scholar 

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Authors and Affiliations

  1. Institute of Polymer Science, University of Akron, 44325, Akron, OH, USA

    Munmaya K. Mishra & Joseph P. Kennedy

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  1. Munmaya K. Mishra
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  2. Joseph P. Kennedy
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Mishra, M.K., Kennedy, J.P. Living carbocationic polymerization. Polymer Bulletin 17, 7–13 (1987). https://doi.org/10.1007/BF00955877

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  • DOI: https://doi.org/10.1007/BF00955877

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