Comparison ofN,N'-bidentate ligands in copper-catalyzed atom transfer polymerization of styrene

DiRenzo, Geraldine M.; Messerschmidt, Martin; Mülhaupt, Rolf

doi:10.1002/(sici)1521-3927(19980701)19:7<381::aid-marc381>3.0.co;2-c

Cited by 5 publications

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“…Styrene polymerization was investigated with some pyridinimine ligands. Homogeneous living polymerizations can be achieved with L-9 (R ) n-Oct) in xylene 104 and with L-12 in the bulk, 105 both with a bromide initiator and CuBr, where the former gave narrower MWDs than the latter (M w /M n ) 1.2 and 1.5-1.8, respectively). L-9 (R ) n-Oct) is also applicable for MA polymerization to give relatively narrow MWDs.…”

Section: Coppermentioning

confidence: 99%

Metal-Catalyzed Living Radical Polymerization

2001

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Section: Coppermentioning

confidence: 99%

Metal-Catalyzed Living Radical Polymerization

2001

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N‐(n‐Alkyl)‐2‐pyridinemethanimine mediated atom transfer radical polymerization of lauryl methacrylate: Effect of length of alkyl group

Srivastava

Choudhary

2011

J of Applied Polymer Sci

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The article describes the polymerization of lauryl methacrylate (LMA) using Cu(I)Br as catalyst for atom transfer radical polymerization in conjunction with N‐(n‐propyl) [PPMI]/(n‐hexyl) [HPMI]/(n‐octyl) [OPMI]‐2‐pyridinemethanimine as complex ligands. The polymerization of LMA was investigated in bulk and solution (toluene as solvent) using Cu(I)Br as catalyst, N‐(n‐alkyl)‐2‐pyridinemethanimine as ligands and ethyl‐2‐bromo isobutyrate (EBiB) as initiator. The ratio of LMA : CuBr : Ligand : EBiB was kept constant in all the polymerizations. In bulk polymerization, the solubility of the catalyst complex increased with increasing the length of alkyl chain on the ligand from propyl to octyl and also gave polymers with narrow molecular weight distribution. The PDI was further narrowed by using OPMI as ligand and toluene was used as solvent. The kinetics of polymerization was also analyzed and it clearly shows that % conversion increased with time. Increase in molecular weight with % conversion without affecting PDI clearly show that the system is living and living nature can be controlled by increasing the length of alkyl group. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Sterically Demanding Iminopyridine Ligands

et al. 2007

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Two sterically demanding iminopyridine ligands, (2,6‐diisopropylphenyl)[6‐(2,4,6‐triisopropylphenyl)pyridin‐2‐ylmethylene]amine and (2,6‐diisopropylphenyl)[6‐(2,6‐dimethylphenyl)pyridin‐2‐ylmethylene]amine, were prepared by a two‐step process: first, condensation of 6‐bromopyridine‐2‐carbaldehyde with an equimolecular amount of 2,6‐diisopropylaniline, and second, Kumada‐type coupling of in‐situ‐formed Grignard compounds of 1‐bromo‐2,6‐dimethylphenyl and 1‐bromo‐2,4,6‐triisopropylphenyl. Dichlorido complexes of the ligands were synthesized starting from FeCl2, [PdCl2(cod)], [NiCl2(dme)], and CoCl2 (cod = 1,5‐cyclooctadiene, dme = dimethoxyethane). X‐ray crystal structure analyses of a Fe, Pd, and Co complex were determined. Ethylene polymerization/oligomerization behavior of the dichlorido complexes after activation with methylaluminoxane or triethylaluminum was studied. Ethylene dimerization selectivity greater than 95 % was observed.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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Comparison ofN,N'-bidentate ligands in copper-catalyzed atom transfer polymerization of styrene

Cited by 5 publications

References 0 publications

Metal-Catalyzed Living Radical Polymerization

Metal-Catalyzed Living Radical Polymerization

N‐(n‐Alkyl)‐2‐pyridinemethanimine mediated atom transfer radical polymerization of lauryl methacrylate: Effect of length of alkyl group

Sterically Demanding Iminopyridine Ligands

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