A chemical approach to the problem of slow initiation in living cationic polymerizations

Miklós Zsuga, Tibor Kelen, Joseph P. Kennedy

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The effect of slow initiation on initiation efficiency and MWD has been investigated, with regard to the living carbocationic polymerization of isobutylene. The initiating system trans−2,5‐diacetoxy‐2,5‐dimethyl−3–hexene(DiOAcDiMeH6)BCl3 has been investigated at −35°C in CH3Cl. Based on considerations valid also for anionic polymerizations, the following methods have been applied to increase the initiation efficiency: 1. Increasing [Mo]/[Io] (batch, AMI) or [ΔM].j/[Io] (IMA). The applicability of this method is limited by the solubility of the polymer. 2. Increasing ki/kp, by (i) increasing ki, e.g., by introducing an electron withdrawing substituent into the initiator, (ii) decreasing kp, e.g., by the addition of a strong electron donor (DMSO) to the system, (iii) using Cl‐CH2‐CH2‐Cl.

Original languageEnglish
Pages (from-to)145-153
Number of pages9
JournalMakromolekulare Chemie. Macromolecular Symposia
Volume32
Issue number1
DOIs
Publication statusPublished - 1990

Fingerprint

Cationic polymerization
Living polymerization
Io
polymerization
Anionic polymerization
Electrons
Dimethyl Sulfoxide
Polymers
Solubility
butenes
initiators
electrons
solubility
polymers
isobutylene

ASJC Scopus subject areas

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

Cite this

A chemical approach to the problem of slow initiation in living cationic polymerizations. / Zsuga, Miklós; Kelen, Tibor; Kennedy, Joseph P.

In: Makromolekulare Chemie. Macromolecular Symposia, Vol. 32, No. 1, 1990, p. 145-153.

Research output: Contribution to journalArticle

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