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Lee JS, Lee NH, Peri S, et al. Surface segregation driven by molecular architecture asymmetry in polymer blends. Phys Rev Lett. 2014;113(22):225702doi: 10.1103/PhysRevLett.113.225702.
Lee, J. S., Lee, N. H., Peri, S., Foster, M. D., Majkrzak, C. F., Hu, R., & Wu, D. T. (2014). Surface segregation driven by molecular architecture asymmetry in polymer blends. Physical review letters, 113(22), 225702. https://doi.org/10.1103/PhysRevLett.113.225702
Lee, Jae Sik, et al. "Surface segregation driven by molecular architecture asymmetry in polymer blends." Physical review letters vol. 113,22 (2014): 225702. doi: https://doi.org/10.1103/PhysRevLett.113.225702
Lee JS, Lee NH, Peri S, Foster MD, Majkrzak CF, Hu R, Wu DT. Surface segregation driven by molecular architecture asymmetry in polymer blends. Phys Rev Lett. 2014 Nov 28;113(22):225702. doi: 10.1103/PhysRevLett.113.225702. Epub 2014 Nov 26. PMID: 25494077.
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Phys Rev Lett. 2014 Nov 28;113(22):225702. doi: 10.1103/PhysRevLett.113.225702. Epub 2014 Nov 26.

Surface segregation driven by molecular architecture asymmetry in polymer blends.

Physical review letters

Jae Sik Lee, Nam-Heui Lee, Somesh Peri, Mark D Foster, Charles F Majkrzak, Renfeng Hu, David T Wu

Affiliations

  1. Department of Polymer Science, The University of Akron, Akron, Ohio 44325, USA.
  2. National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
  3. Department of Chemical Engineering and Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, USA.

PMID: 25494077 DOI: 10.1103/PhysRevLett.113.225702

Abstract

The contributions of chain ends and branch points to surface segregation of long-branched chains in blends with linear chains have been studied using neutron reflectometry and surface-enhanced Raman spectroscopy for a series of novel, well-defined polystyrenes. A linear response theory accounting for the number and type of branch points and chain ends is consistent with surface excesses and composition profile decay lengths, and allows the first determination of branch point potentials. Surface excess is determined primarily by chain ends with branch points playing a secondary role.

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