Annealing of single lamella nanoparticles of polyethylene

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2011
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Rochette, Christophe N.
Rosenfeldt, Sabine
Henzler, Katja
Polzer, Frank
Ballauff, Matthias
Tong, Qiong
Drechsler, Markus
Narayanan, Theyencheri
Harnau, Ludger
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Macromolecules. 2011, 44(12), pp. 4845-4851. ISSN 0024-9297. Available under: doi: 10.1021/ma2003213
Zusammenfassung

We study the change of the size and structure of freely suspended single lamella nanoparticles of polyethylene during thermal annealing in aqueous solutions. Using small-angle X-ray scattering and cryogenic transmission electron microscopy, it is shown that a doubling of the crystalline lamella sandwiched between two amorphous polymer layers is obtained by annealing the nanoparticles at 125 °C. This thickening of the crystalline lamella can be understood in terms of an unlooping of polymer chains within a single nanoparticle. In addition, a variation of the annealing temperature from 90 to 115 °C demonstrates that the inverse of the crystalline lamellar thickness increases linearly with the annealing temperatures leading to a recrystallization line in a Gibbs–Thomson graph. Since the nanoparticles consist of about only eight polymer chains, they can be considered as a ideal candidates for the experimental realization of equilibrium polymer crystals.

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ISO 690ROCHETTE, Christophe N., Sabine ROSENFELDT, Katja HENZLER, Frank POLZER, Matthias BALLAUFF, Qiong TONG, Stefan MECKING, Markus DRECHSLER, Theyencheri NARAYANAN, Ludger HARNAU, 2011. Annealing of single lamella nanoparticles of polyethylene. In: Macromolecules. 2011, 44(12), pp. 4845-4851. ISSN 0024-9297. Available under: doi: 10.1021/ma2003213
BibTex
@article{Rochette2011Annea-19284,
  year={2011},
  doi={10.1021/ma2003213},
  title={Annealing of single lamella nanoparticles of polyethylene},
  number={12},
  volume={44},
  issn={0024-9297},
  journal={Macromolecules},
  pages={4845--4851},
  author={Rochette, Christophe N. and Rosenfeldt, Sabine and Henzler, Katja and Polzer, Frank and Ballauff, Matthias and Tong, Qiong and Mecking, Stefan and Drechsler, Markus and Narayanan, Theyencheri and Harnau, Ludger}
}
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