Some aspects of the living isobutylene polymerization

Tibor Kelen, Tibor Kelen, Lajos Balogh, Istvan Majoros, G. Deák

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12 Citations (Scopus)

Abstract

The possibilities of increasing the livingness in cationic isobutylene polymerizations has been investigated. It has been assumed that the living chain‐end is polarized but non‐dissociated and relatively stable, therefore, i) shifting of the dissociation equilibrium by adding salts with common or non‐common anion in excess, and ii) increasing of the stability of the chain‐end by complexing it with electrondonors, may increase the livingness of the system. Indeed, the addition of n‐Bu4NCl or n‐Bu4NI to systems with BCl3 or TiCl4 coinitiators, as well as the addition of dimethyl sulphoxide as electrondonor in a broad concentration range, improved the living character. The possibility of complexation of the chain‐end by the monomer has also been supported

Original languageEnglish
Pages (from-to)325-338
Number of pages14
JournalMacromolecular Symposia
Volume67
Issue number1
DOIs
Publication statusPublished - 1993

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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