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Cited by 290

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Dynamics of Entangled H-Polymers: Theory, Rheology, and Neutron-Scattering

McLeish, T. C. B., Allgaier, J., Bick, D. K., Bishko, G., Biswas, P., Blackwell, R., Blottière, B., Clarke, N., Gibbs, B., Groves, D. J., Hakiki, A., Heenan, R. K., Johnson, J. M., Kant, R., Read, D. J., Young, R. N.·1999·Macromolecules
DOI 10.1021/ma990323j
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Abstract

We present experiments and theory on the melt dynamics of monodisperse entangled polymers of H-shaped architecture. Frequency-dependent rheological data on a series of polyisoprene H-polymers are in good agreement with a tube model theory that combines path-length fluctuation (like that of star polymer melts) at high frequency, with reptation of the self-entangled “cross-bars” at low frequencies (like that of linear polymer melts). We account explicitly for mild polydispersity. Nonlinear step-strain and transient data in shear and extension confirm the presence of a relaxation time not seen in linear response, corresponding to the curvilinear stretch of the cross-bars. This time is very sensitive to strain due to the exponential dependence of the branch-point friction constants on the effective dangling path length. Strain-induced rearrangements of the branch points are confirmed by small-angle neutron scattering (SANS) on stretched and quenched partially deuterated samples. We develop an extension of melt-scattering theory to deal with the presence of deformed tube variables to interpret the SANS data.

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Metadata

Authors
McLeish, T. C. B., Allgaier, J., Bick, D. K., Bishko, G., Biswas, P., Blackwell, R., Blottière, B., Clarke, N., Gibbs, B., Groves, D. J., Hakiki, A., Heenan, R. K., Johnson, J. M., Kant, R., Read, D. J., & Young, R. N.
Venue
Macromolecules
Publisher
American Chemical Society (ACS)
Published
1999-09-09
Volume
32
Issue
20
Pages
6734-6758
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
DOI
10.1021/ma990323j
OpenAlex
W2001268360
Cited by
290
References
27
FWCI
16.35
Type
journal article
Language
en
Open access
closed

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