Neither Gaussian chains nor hard spheres - Star polymers seen as ultrasoft colloids

J. Stellbrink; J. Allgaier; M. Monkenbusch; D. Richter; C. N. Likos; M. Watzlawek; H. Löwen; G. Ehlers; P. Schleger

doi:10.1007/3-540-46545-6_18

Neither Gaussian chains nor hard spheres - Star polymers seen as ultrasoft colloids

J. Stellbrink, J. Allgaier, M. Monkenbusch, D. Richter, C. N. Likos, M. Watzlawek, H. Löwen, G. Ehlers, P. Schleger

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

35 Scopus citations

Abstract

In dense solution high functionality star polymers show ordering phenomena which give rise to a well-pronounced peak in the static structure factor, S_exp(Q), observed by small-angle neutron scattering. The concentration dependence of S_exp(Q) gives evidence for unusual phase behaviour as predicted by theory. In addition, the dynamics of the star polymer solutions is dominated by an increasing amount of structural arrest with increasing concentration. The mean square displacement obtained from neutron spin-echo spectroscopy is compared to the blob size obtained from dynamic light scattering. Thermal energy enables each star core to perform restricted motion over a spatial extent equal to the blob size of the surrounding dense star polymer solution.

Original language	English
Pages (from-to)	88-92
Number of pages	5
Journal	Progress in Colloid and Polymer Science
Volume	115
DOIs	https://doi.org/10.1007/3-540-46545-6_18
State	Published - 2000
Externally published	Yes

Keywords

Liquid-state theory
Neutron spin-echo spectroscopy
Pair potential
Small-angle neutron scattering
Star polymers

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10.1007/3-540-46545-6_18

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title = "Neither Gaussian chains nor hard spheres - Star polymers seen as ultrasoft colloids",

abstract = "In dense solution high functionality star polymers show ordering phenomena which give rise to a well-pronounced peak in the static structure factor, Sexp(Q), observed by small-angle neutron scattering. The concentration dependence of Sexp(Q) gives evidence for unusual phase behaviour as predicted by theory. In addition, the dynamics of the star polymer solutions is dominated by an increasing amount of structural arrest with increasing concentration. The mean square displacement obtained from neutron spin-echo spectroscopy is compared to the blob size obtained from dynamic light scattering. Thermal energy enables each star core to perform restricted motion over a spatial extent equal to the blob size of the surrounding dense star polymer solution.",

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doi = "10.1007/3-540-46545-6_18",

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T1 - Neither Gaussian chains nor hard spheres - Star polymers seen as ultrasoft colloids

AU - Stellbrink, J.

AU - Allgaier, J.

AU - Monkenbusch, M.

AU - Richter, D.

AU - Likos, C. N.

AU - Watzlawek, M.

AU - Löwen, H.

AU - Ehlers, G.

AU - Schleger, P.

PY - 2000

Y1 - 2000

N2 - In dense solution high functionality star polymers show ordering phenomena which give rise to a well-pronounced peak in the static structure factor, Sexp(Q), observed by small-angle neutron scattering. The concentration dependence of Sexp(Q) gives evidence for unusual phase behaviour as predicted by theory. In addition, the dynamics of the star polymer solutions is dominated by an increasing amount of structural arrest with increasing concentration. The mean square displacement obtained from neutron spin-echo spectroscopy is compared to the blob size obtained from dynamic light scattering. Thermal energy enables each star core to perform restricted motion over a spatial extent equal to the blob size of the surrounding dense star polymer solution.

AB - In dense solution high functionality star polymers show ordering phenomena which give rise to a well-pronounced peak in the static structure factor, Sexp(Q), observed by small-angle neutron scattering. The concentration dependence of Sexp(Q) gives evidence for unusual phase behaviour as predicted by theory. In addition, the dynamics of the star polymer solutions is dominated by an increasing amount of structural arrest with increasing concentration. The mean square displacement obtained from neutron spin-echo spectroscopy is compared to the blob size obtained from dynamic light scattering. Thermal energy enables each star core to perform restricted motion over a spatial extent equal to the blob size of the surrounding dense star polymer solution.

KW - Liquid-state theory

KW - Neutron spin-echo spectroscopy

KW - Pair potential

KW - Small-angle neutron scattering

KW - Star polymers

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DO - 10.1007/3-540-46545-6_18

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JO - Progress in Colloid and Polymer Science

JF - Progress in Colloid and Polymer Science

ER -

Neither Gaussian chains nor hard spheres - Star polymers seen as ultrasoft colloids

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Keywords

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