Publication detail

Living/controlled hex-1-ene polymerization initiated by nickel diimine complexes activated by non-MAO cocatalysts: Kinetic and UV-vis study

PELEŠKA, J. HOŠŤÁLEK, Z. HASALÍKOVÁ, D. MERNA, J.

Original Title

Type

journal article - other

Language

English

Original Abstract

Living/controlled polymerization of hex-1-ene initiated by nickel diimine catalysts of general form [ArN=C(1,8-naphthalenediyl)C=NAr]NiBr2 activated by simple organoaluminium compounds was investigated. Polyhexenes with a very narrow molar mass distribution and molar mass controlled by the monomer/initiator ratio were prepared using diethylaluminiumchloride, ethylaluminiumdichloride and methylaluminiumdichloride as cocatalysts for nickel complexes 1 (Ar = 2,6-iPr2C6H3) and 2 (Ar = 2-tBuC6H4). Nickel complexes with smaller aryl substituents (3, Ar = 2,6-Me2C6H3; 4 Ar = 2,4,6-Me3C6H2; 5, Ar = 2,6-Et2C6H3) undergo transfer reactions significantly. For the most bulky complex 1 activated by ethylaluminiumdichloride living hex-1-ene polymerization was achieved, proved by the reinitiation of polymer growth upon the addition of fresh monomer. The effect of Al/Ni ratio on the activity of the catalytic systems was studied by dilatometry. The catalytic systems were investigated by UV-vis spectrometry and a new interpretation of their absorption spectra was suggested.

Keywords

Nickel catalyst, living/controlled olefin polymerization, non-MAO cocatalysts

Authors

PELEŠKA, J.; HOŠŤÁLEK, Z.; HASALÍKOVÁ, D.; MERNA, J.

RIV year

2011

Released

21. 1. 2011

ISBN

0032-3861

Periodical

Polymer

Year of study

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

275

Pages to

281

Pages count

BibTex

@article{BUT50985,
  author="PELEŠKA, J. and HOŠŤÁLEK, Z. and HASALÍKOVÁ, D. and MERNA, J.",
  title="Living/controlled hex-1-ene polymerization initiated by nickel diimine complexes activated by non-MAO cocatalysts: Kinetic and UV-vis study",
  journal="Polymer",
  year="2011",
  volume="52",
  number="2",
  pages="275--281",
  issn="0032-3861"
}