%0 Journal Article
%A Sharma, Aakash
%A Kruteva, Margarita
%A Zamponi, Michaela
%A Ehlert, Sascha
%A Richter, Dieter
%A Förster, Stephan
%T Influence of molecular weight on the distribution of segmental relaxation in polymer grafted nanoparticles
%J Physical review materials
%V 6
%N 1
%@ 2475-9953
%C College Park, MD
%I APS
%M FZJ-2022-02676
%P L012601
%D 2022
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000753878000002
%R 10.1103/PhysRevMaterials.6.L012601
%U https://juser.fz-juelich.de/record/908552