This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevMaterials.6.L012601 in citations.
Please use the identifier: http://hdl.handle.net/2128/31491 in citations.
Influence of molecular weight on the distribution of segmental relaxation in polymer grafted nanoparticles
Influence of molecular weight on the distribution of segmental relaxation in polymer grafted nanoparticles
The segmental dynamics of one-component nanocomposites (OCNC) is significantly influenced by the molecular weight (Mw) of the grafted polymer. Neutron backscattering shows that compared to the neat polymer the OCNCs exhibit a shift from slower segmental dynamics at low Mw to faster dynamics at high...
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Personal Name(s): | Sharma, Aakash (Corresponding author) |
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Kruteva, Margarita (Corresponding author) / Zamponi, Michaela / Ehlert, Sascha / Richter, Dieter / Förster, Stephan | |
Contributing Institute: |
JCNS-FRM-II; JCNS-FRM-II JCNS-4; JCNS-4 Streumethoden; JCNS-2 Neutronenstreuung; JCNS-1 Heinz Maier-Leibnitz Zentrum; MLZ |
Published in: | Physical review materials, 6 (2022) 1, S. L012601 |
Imprint: |
College Park, MD
APS
2022
|
DOI: |
10.1103/PhysRevMaterials.6.L012601 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/31491 in citations.
The segmental dynamics of one-component nanocomposites (OCNC) is significantly influenced by the molecular weight (Mw) of the grafted polymer. Neutron backscattering shows that compared to the neat polymer the OCNCs exhibit a shift from slower segmental dynamics at low Mw to faster dynamics at high Mw. We model the local relaxation as distribution of exponential diffusers. This approach reveals the presence of fast and slow segments in both OCNCs. However, their fractional contribution varies with Mw leading to different average relaxation times. Our results present important insights into the origin of segmental mobility in OCNC and address the inconsistencies in different literature reports. |