Stability of propagating species in living carbocationic polymerization

Daniela Held, B. Iván, Axel H E Müller, Feike De Jong, Teun Graafland

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Citations (Scopus)

Abstract

The stability of living polyisobutylene chains obtained by the 1,3-di(2-chloro-2-propyl)-5-tert-butylbenzene (tBuDiCumCl)/TiCl4 initiating system was investigated under monomer starved conditions (100% monomer conversion) in the absence and presence of different additives, such as N,N-dimethylacetamide (DMA), 2,6-di-tert-butylpyridine (DtBP), pyridine (Py) and 2,4-dimethylpyridine (DMPy), in CH2Cl2/hexane (40:60 v/v) mixture at -78°C. With the exception of DtBP, all the additives resulted in unexpected stability of the propagating carbocationic species in these systems. Only negligible amounts of chain ends with expected double bonds were formed as verified by 1H NMR. However, molecular weight data suggest that there is difference in the effect of the examined nucleophilic compounds in their mode of action during living polymerization of isobutylene. It is concluded that the currently existing mechanistic propositions cannot satisfactorily explain experimental results of living isobutylene polymerization.

Original languageEnglish
Title of host publicationAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Pages333-334
Number of pages2
Volume37
Edition1
Publication statusPublished - Mar 1996

Fingerprint

Living polymerization
Monomers
Hexanes
Hexane
Pyridine
Molecular weight
Nuclear magnetic resonance
isobutylene
polyisobutylene
2,4-dimethylpyridine
pyridine
tert-butylbenzene
titanium tetrachloride
dimethylacetamide

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Held, D., Iván, B., Müller, A. H. E., De Jong, F., & Graafland, T. (1996). Stability of propagating species in living carbocationic polymerization. In American Chemical Society, Polymer Preprints, Division of Polymer Chemistry (1 ed., Vol. 37, pp. 333-334)

Stability of propagating species in living carbocationic polymerization. / Held, Daniela; Iván, B.; Müller, Axel H E; De Jong, Feike; Graafland, Teun.

American Chemical Society, Polymer Preprints, Division of Polymer Chemistry. Vol. 37 1. ed. 1996. p. 333-334.

Research output: Chapter in Book/Report/Conference proceedingChapter

Held, D, Iván, B, Müller, AHE, De Jong, F & Graafland, T 1996, Stability of propagating species in living carbocationic polymerization. in American Chemical Society, Polymer Preprints, Division of Polymer Chemistry. 1 edn, vol. 37, pp. 333-334.
Held D, Iván B, Müller AHE, De Jong F, Graafland T. Stability of propagating species in living carbocationic polymerization. In American Chemical Society, Polymer Preprints, Division of Polymer Chemistry. 1 ed. Vol. 37. 1996. p. 333-334
Held, Daniela ; Iván, B. ; Müller, Axel H E ; De Jong, Feike ; Graafland, Teun. / Stability of propagating species in living carbocationic polymerization. American Chemical Society, Polymer Preprints, Division of Polymer Chemistry. Vol. 37 1. ed. 1996. pp. 333-334
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