Polymer Bulletin

, Volume 17, Issue 3, pp 205–211 | Cite as

Living carbocationic polymerization

XII. Telechelic polyisobutylenes by a sterically hindered bifunctional initiator
  • Biao Wang
  • Munmaya K. Mishra
  • Joseph P. Kennedy
Article
Accepted:

Summary

The “living” synthesis of α,Ω-di-tert.-chloropolyisobutylene ( t -Cl-telechelic PIB) has been accomplished by the use of the sterically hindered bifunctional initiator 1,3-di-(2-methoxy-2-propyl)-5-tert.-butylbenzene (tBu-m-DiCuOMe) in conjunction with BC13 coinitiator in CH3Cl or CH2Cl2 diluents at −30°C and −10°C. The living nature of the polymerizations was demonstrated by linear ¯Mn versus WPIB (g of PIB formed) plots starting at the origin and horizontal N (number of PIB moles) versus WPIB plots. The molecular weight distributions are narrow (¯MW/¯Mn < 2.0) and tend to decrease with increasing molecular weights. Number average end functionalities have been quantitated and found to be ¯Fn = 2.0±0.1.

Keywords

Polymerization Molecular Weight CH2Cl2 Material Processing Weight Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Biao Wang
    • 1
  • Munmaya K. Mishra
    • 1
  • Joseph P. Kennedy
    • 1
  1. 1.Institute of Polymer ScienceUniversity of AkronAkronUSA

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