Living carbocationic polymerization of isobutylene and synthesis of ABA block copolymers by conventional laboratory techniques

Hanne Everland, Jørgen Kops, Anders Nielsen, B. Iván

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Living polymerization of isobutylene (IB) and subsequent controlled synthesis of ABA block copolymers, such as poly(styrene-b-isobutylene-b-styrene) (PSt-PIB-PSt) and poly(p-methylstyrene-b-isobutylene-b-p-methylstyrene) (PpMeSt-PIB-PpMeSt), have been carried out by a simple and inexpensive conventional laboratory technique. The homo- and block copolymers obtained by using this technique have exhibited excellent molecular weight control and low polydispersity indexes. The living nature of IB polymerization has been demonstrated by the incremental monomer addition (IMA) method with the dicumyl methyl ether (DiCumOMe)/TiCl4 initiating system in the presence of 2,5-di-tert-butylpyridine (D tBP) proton trap. PSt-PIB-PSt and PpMeSt-PIB-PpMeSt block copolymers have been synthesized by sequential monomer addition: first living difunctional polyisobutylene (PIB) midsegment was prepared by difunctional initiator, then the second monomer was added to the charge. High blocking efficiencies and desired block copolymer structures have been obtained.

Original languageEnglish
Pages (from-to)159-166
Number of pages8
JournalPolymer Bulletin
Volume31
Issue number2
DOIs
Publication statusPublished - Aug 1993

Fingerprint

polyisobutylene
Living polymerization
butenes
block copolymers
Block copolymers
polymerization
Monomers
synthesis
monomers
Styrene
Weight control
Polydispersity
Methyl Ethers
Ethers
initiators
Protons
styrenes
Molecular weight
Polymerization
molecular weight

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Living carbocationic polymerization of isobutylene and synthesis of ABA block copolymers by conventional laboratory techniques. / Everland, Hanne; Kops, Jørgen; Nielsen, Anders; Iván, B.

In: Polymer Bulletin, Vol. 31, No. 2, 08.1993, p. 159-166.

Research output: Contribution to journalArticle

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