Nonergodicity and light scattering from polymer gels

J. Z. Xue, D. J. Pine, S. T. Milner, X. L. Wu, P. M. Chaikin

Research output: Contribution to journalArticle

Abstract

Dynamic light scattering from polymer gels is complicated by the fact that the scattering intensity and its time correlation function change as different parts of a sample are explored. This results from the nonergodicity of the sample-time averages are not the same as ensemble averages, the result of a finite rigidity that leads to constrained inhomogeneities. We demonstrate a direct technique for ensemble averaging (by moving the sample), present the experimental correlation function containing correlations that do not decay with time, and show that the light scattering results from a superposition of static scattering from immobile inhomogeneities and dynamic density fluctuations from ''gel modes.''

Original languageEnglish (US)
Pages (from-to)6550-6563
Number of pages14
JournalPhysical Review A
Volume46
Issue number10
DOIs
StatePublished - 1992

Fingerprint

light scattering
gels
polymers
inhomogeneity
scattering
rigidity
decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Xue, J. Z., Pine, D. J., Milner, S. T., Wu, X. L., & Chaikin, P. M. (1992). Nonergodicity and light scattering from polymer gels. Physical Review A, 46(10), 6550-6563. https://doi.org/10.1103/PhysRevA.46.6550

Nonergodicity and light scattering from polymer gels. / Xue, J. Z.; Pine, D. J.; Milner, S. T.; Wu, X. L.; Chaikin, P. M.

In: Physical Review A, Vol. 46, No. 10, 1992, p. 6550-6563.

Research output: Contribution to journalArticle

Xue, JZ, Pine, DJ, Milner, ST, Wu, XL & Chaikin, PM 1992, 'Nonergodicity and light scattering from polymer gels', Physical Review A, vol. 46, no. 10, pp. 6550-6563. https://doi.org/10.1103/PhysRevA.46.6550
Xue, J. Z. ; Pine, D. J. ; Milner, S. T. ; Wu, X. L. ; Chaikin, P. M. / Nonergodicity and light scattering from polymer gels. In: Physical Review A. 1992 ; Vol. 46, No. 10. pp. 6550-6563.
@article{749ac71dbba4492aa19e6dfd7012f9f4,
title = "Nonergodicity and light scattering from polymer gels",
abstract = "Dynamic light scattering from polymer gels is complicated by the fact that the scattering intensity and its time correlation function change as different parts of a sample are explored. This results from the nonergodicity of the sample-time averages are not the same as ensemble averages, the result of a finite rigidity that leads to constrained inhomogeneities. We demonstrate a direct technique for ensemble averaging (by moving the sample), present the experimental correlation function containing correlations that do not decay with time, and show that the light scattering results from a superposition of static scattering from immobile inhomogeneities and dynamic density fluctuations from ''gel modes.''",
author = "Xue, {J. Z.} and Pine, {D. J.} and Milner, {S. T.} and Wu, {X. L.} and Chaikin, {P. M.}",
year = "1992",
doi = "10.1103/PhysRevA.46.6550",
language = "English (US)",
volume = "46",
pages = "6550--6563",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "10",

}

TY - JOUR

T1 - Nonergodicity and light scattering from polymer gels

AU - Xue, J. Z.

AU - Pine, D. J.

AU - Milner, S. T.

AU - Wu, X. L.

AU - Chaikin, P. M.

PY - 1992

Y1 - 1992

N2 - Dynamic light scattering from polymer gels is complicated by the fact that the scattering intensity and its time correlation function change as different parts of a sample are explored. This results from the nonergodicity of the sample-time averages are not the same as ensemble averages, the result of a finite rigidity that leads to constrained inhomogeneities. We demonstrate a direct technique for ensemble averaging (by moving the sample), present the experimental correlation function containing correlations that do not decay with time, and show that the light scattering results from a superposition of static scattering from immobile inhomogeneities and dynamic density fluctuations from ''gel modes.''

AB - Dynamic light scattering from polymer gels is complicated by the fact that the scattering intensity and its time correlation function change as different parts of a sample are explored. This results from the nonergodicity of the sample-time averages are not the same as ensemble averages, the result of a finite rigidity that leads to constrained inhomogeneities. We demonstrate a direct technique for ensemble averaging (by moving the sample), present the experimental correlation function containing correlations that do not decay with time, and show that the light scattering results from a superposition of static scattering from immobile inhomogeneities and dynamic density fluctuations from ''gel modes.''

UR - http://www.scopus.com/inward/record.url?scp=0001510022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001510022&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.46.6550

DO - 10.1103/PhysRevA.46.6550

M3 - Article

VL - 46

SP - 6550

EP - 6563

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 10

ER -