Journal Article

FZJ-2019-01733

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The locally columnar model for clay/polymer systems: Connections to scattering experiments

Frielinghaus, H. (Corresponding author)FZJ* ; Koch, K.FZJ* ; Antonio, V. P.FZJ* ; Noda, Y. ; Koizumi, S.

2019
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/21799  doi:10.1016/j.jcis.2019.02.091

Abstract: A tight connection of scattering to thermodynamic models is missing for clay systems. A new approach called “locally columnar model” gives an attempt for making this connection. The scattering model assumes an up-lining of clay particles with strong paracrystalline order and refers to a chemical potential/distance dependence. The thermodynamic model assumes a bidisperse distance distribution and gives input to the scattering model. Experimentally, polymer/clay systems with many molecular polymer masses were studied showing all very similar scattering curves. While the dominating bulk phase shows only the same weak tendency to stack formation for all molecular polymer masses, one coexisting phase with stronger stack formation was identified. The latter sample was used to determine the thickness of the clay platelets with adsorbed polymer that was then used to model the dominating bulk phase. The comparisons to the theory revealed that (a) most polymers are tightly bound to the clay, and (b) an agreement between the modeling and the theory was achieved. The main result of the experiments is the fraction of free polymers of 1:2400 that are not tightly bound to the clay particles.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd) ; Soft Condensed Matter (2nd) ; Materials Science (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Neutronenstreuung (JCNS-1)

Research Program(s):

1. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)
2. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
3. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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