This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.physb.2006.06.076 in citations.
SANS studies of confined diblock copolymers in microemulsions
SANS studies of confined diblock copolymers in microemulsions
Using small angle neutron scattering (SANS) polymers were studied as additives in microemulsions. Usually, one assumes no or small confinement, which is expressed by the ratio of the polymer size R-g and the domain size d. For amphiphilic diblock copolymers, an increased surfactant efficiency and a...
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Personal Name(s): | Frielinghaus, H. |
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Maccarrone, S. / Byelov, D. / Allgaier, J. / Richter, D. / Auth, T. / Gompper, G. | |
Contributing Institute: |
Theorie II; IFF-TH-II JCNS; JCNS Streumethoden; IFF-ISM Neutronenstreuung; IFF-INS Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM |
Published in: | Physica / B, 385-386 (2006) S. 738 - 741 |
Imprint: |
Amsterdam
North-Holland Physics Publ.
2006
|
Physical Description: |
738 - 741 |
DOI: |
10.1016/j.physb.2006.06.076 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
Physica B: Condensed Matter
385-386 |
Subject (ZB): | |
Publikationsportal JuSER |
Using small angle neutron scattering (SANS) polymers were studied as additives in microemulsions. Usually, one assumes no or small confinement, which is expressed by the ratio of the polymer size R-g and the domain size d. For amphiphilic diblock copolymers, an increased surfactant efficiency and a more rigid surfactant membrane were observed. The sensitivity of the diblock copolymer effect on polymer concentration agreed with theoretical predictions. The current study is focused on medium and higher confinement of diblock copolymers. A computer simulation predicted elevated sensitivities for medium confinement and a reversed behaviour for high confinement. Experimentally, we found evidence for the reversal between medium and high confinement. The correlation length, which is proportional to the membrane rigidity, increased or decreased depending on the level of confinement. This result supports the interpretation that at high confinement the anchored diblock copolymer and the free homopolymer cannot be distinguished anymore. (c) 2006 Elsevier B.V. All rights reserved. |