TY  - JOUR
AU  - Sharma, Aakash
AU  - Kruteva, Margarita
AU  - Zamponi, Michaela
AU  - Ehlert, Sascha
AU  - Richter, Dieter
AU  - Förster, Stephan
TI  - Influence of molecular weight on the distribution of segmental relaxation in polymer grafted nanoparticles
JO  - Physical review materials
VL  - 6
IS  - 1
SN  - 2475-9953
CY  - College Park, MD
PB  - APS
M1  - FZJ-2022-02676
SP  - L012601
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000753878000002
DO  - DOI:10.1103/PhysRevMaterials.6.L012601
UR  - https://juser.fz-juelich.de/record/908552
ER  -