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The propagation rate-constants in cationic polymerisations

  • P. H. Plesch
Conference paper
Part of the Advances in Polymer Science book series (POLYMER, volume 8)

Abstract

An observer who is accustomed to the relative clarity and simplicity of radical and anionic polymerisations and the abundance of information about them might suggest that “Much Ado about Nothing” would be an appropriate sub-title to this article. The fact is indeed that in the field of cationic polymerisation there are still only very few rate-constants which can be regarded as well substantiated. In this situation we have deliberately refrained here from quoting and criticising in detail each and every claim to have measured a rateconstant. Instead, we thought it more useful to explore the origins of the present unsatisfactory position, and to indicate some guide-lines which will help in the planning of future researches.

It now appears that much more careful thought is required in the selection of systems which may offer the prospect of yielding unambiguous results. In particular, the choice of solvent and initiator must be considered very carefully, and features such as mechanisms of initiation, catalyst efficiency, nature of end-groups, and the internal order of reactions need to be explored much more thoroughly than has been customary in the past. Too much effort has been wasted by ignoring the precept: “First the Chemistry, then the Kinetics”.

Keywords

Vinyl Ether Cyclic Ether Paired Cation Ethylene Dichloride Methylene Dichloride 
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 1971

Authors and Affiliations

  • P. H. Plesch
    • 1
  1. 1.Chemistry DepartmentUniversity of KeeleNorth StaffordshireEngland

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