Mobility of polymer chains confined at a free surface

Y. Pu; M. H. Rafailovich; J. Sokolov; D. Gersappe; T. Peterson; W. L. Wu; S. A. Schwarz

Mobility of polymer chains confined at a free surface

Y. Pu
, M. H. Rafailovich
, J. Sokolov
, D. Gersappe
, T. Peterson
, W. L. Wu
, S. A. Schwarz

Materials Science and Engineering

Stony Brook University
Ward Melville High School
National Institute of Standards and Technology
City University of New York

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

A comprehensive set of experiments were performed to determine the long-range center of mass dynamics of polymer chains normal to the free surface of a melt. In particular, the interrelationship between structure and dynamics was directly probed. Dynamic secondary ion mass spectrometry (DSIMS) was used to systematically investigate the center of mass diffusion of the polymers with different molecular weight as a function of distance from the vacuum interface. Using the mean field theory, it was possible to calculate the chain conformation at the free surface and compare with the experimental measurements of the chain dynamics.

Original language	English
Article number	206101
Pages (from-to)	206101/1-206101/4
Journal	Physical Review Letters
Volume	87
Issue number	20
State	Published - Nov 12 2001

Cite this

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AU - Pu, Y.

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AU - Sokolov, J.

AU - Gersappe, D.

AU - Peterson, T.

AU - Wu, W. L.

AU - Schwarz, S. A.

PY - 2001/11/12

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AB - A comprehensive set of experiments were performed to determine the long-range center of mass dynamics of polymer chains normal to the free surface of a melt. In particular, the interrelationship between structure and dynamics was directly probed. Dynamic secondary ion mass spectrometry (DSIMS) was used to systematically investigate the center of mass diffusion of the polymers with different molecular weight as a function of distance from the vacuum interface. Using the mean field theory, it was possible to calculate the chain conformation at the free surface and compare with the experimental measurements of the chain dynamics.

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M3 - Article

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Mobility of polymer chains confined at a free surface

Abstract

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