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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
Published on: August 2, 2012
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Supramolecular structures of self-assembled oligomers under confinement
Jarosław Paturej1,2, Kajetan Koperwas1, Magdalena Tarnacka1
1August Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland. jaroslaw.paturej@us.edu.pl.
Soft Matter
|June 22, 2022
Summary
Confinement limits oligomer aggregation, reducing the prepeak (PP) intensity in confined polymers. Molecular dynamics simulations reveal pendant group planarity drives self-association, but spatial disorder is key for PP formation.
Area of Science:
- Polymer science
- Materials science
- Soft matter physics
Background:
- A prepeak (PP) in structure factors is observed in bulk oligomers like PMMS, PMMS-g-HMA, and PMPS.
- Reduced PP intensity is detected for these oligomers confined in small-diameter cylindrical pores.
Purpose of the Study:
- Investigate the molecular origin of the prepeak (PP) in oligomer structure factors.
- Understand the mechanism behind the PP intensity reduction in confined polymer systems.
Main Methods:
- Utilized X-ray diffraction measurements.
- Employed coarse-grained bead-spring molecular dynamics simulations.
- Analyzed the spatial arrangement and aggregation of oligomers.
Main Results:
- Oligomer self-association into nanoaggregates is triggered by the planarity of pendant groups.
- Prepeak formation requires spatial disturbance in side group arrangement within clusters.
- Increasing confinement restricts oligomer aggregation, leading to lower PP amplitude.
Conclusions:
- Pendant group planarity and spatial disorder are crucial for prepeak formation in bulk oligomers.
- Confinement effects significantly alter oligomer aggregation behavior, reducing prepeak intensity.
