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Variable crystallinity polyethylene nanoparticles

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2009

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Yu, Sze-Man

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-89726
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https://doi.org/10.1021/ma9003665
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Macromolecules. 2009, 42(11), pp. 3669-3673. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9003665

Zusammenfassung

Water-soluble complexes based on enolatoimine ligands bearing electron-withdrawing trifluoromethyl groups [κ2-N,O-{2,6- 2C6H3N═C(H)C(COCF3)═C(O)CF3}NiMe(L)] (1a, R = 3,5-(CF3)2C6H3, L = Me(OCH2CH2)nNH2; 1b, R = 3,5-(CF3)2C6H3, L = TPPDS; 2b, R = iPr, L = TPPDS; 2c, R = iPr, L = TPPTS with TPPDS = PhP(p-C6H4SO3Na)2 and TPPTS = P(m-C6H4SO3Na)3) were prepared. These complexes polymerize ethylene to very small (10−30 nm) semicrystalline particles of high molecular weight (up to Mw 1.6 × 106 g mol−1) polymer with a degree of branching (7−63 branches per 1000 C atoms) and thus crystallinity (≤25−50%) and melt transition temperatures (Tm = 75−129 °C) variable over a large range, depending on the substituents of the N-aryl moiety (2,6-R2C6H3), and the polymerization temperature. The catalysts are stable for hours under polymerization conditions (50 °C) in the highly disperse aqueous system.

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540 Chemie

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ISO 690YU, Sze-Man, Stefan MECKING, 2009. Variable crystallinity polyethylene nanoparticles. In: Macromolecules. 2009, 42(11), pp. 3669-3673. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9003665
BibTex
@article{Yu2009Varia-1089,
  year={2009},
  doi={10.1021/ma9003665},
  title={Variable crystallinity polyethylene nanoparticles},
  number={11},
  volume={42},
  issn={0024-9297},
  journal={Macromolecules},
  pages={3669--3673},
  author={Yu, Sze-Man and Mecking, Stefan}
}
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    <dcterms:abstract xml:lang="deu">Water-soluble complexes based on enolatoimine ligands bearing electron-withdrawing trifluoromethyl groups [κ2-N,O-{2,6- 2C6H3N═C(H)C(COCF3)═C(O)CF3}NiMe(L)] (1a, R = 3,5-(CF3)2C6H3, L = Me(OCH2CH2)nNH2; 1b, R = 3,5-(CF3)2C6H3, L = TPPDS; 2b, R = iPr, L = TPPDS; 2c, R = iPr, L = TPPTS with TPPDS = PhP(p-C6H4SO3Na)2 and TPPTS = P(m-C6H4SO3Na)3) were prepared. These complexes polymerize ethylene to very small (10−30 nm) semicrystalline particles of high molecular weight (up to Mw 1.6 × 106 g mol−1) polymer with a degree of branching (7−63 branches per 1000 C atoms) and thus crystallinity (≤25−50%) and melt transition temperatures (Tm = 75−129 °C) variable over a large range, depending on the substituents of the N-aryl moiety (2,6-R2C6H3), and the polymerization temperature. The catalysts are stable for hours under polymerization conditions (50 °C) in the highly disperse aqueous system.</dcterms:abstract>
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