This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1021/ma402439v in citations.
Multiscale Dynamics of Inhomogeneity-Free Polymer Gels
Multiscale Dynamics of Inhomogeneity-Free Polymer Gels
For precise understanding of the dynamics of gels, it is necessary to distinguish the effect of inherent cross-linking from accompanying inhomogeneity. This separation is realized by the use of inhomogeneity-free gel such as Tetra-PEG gel. We investigated the dynamics of Tetra-PEG gel by quasi-elast...
Saved in:
Personal Name(s): | Hiroi, Takashi (Corresponding Author) |
---|---|
Ohl, Michael / Sakai, Takamasa / Shibayama, Mitsuhiro | |
Contributing Institute: |
Neutronenstreuung; ICS-1 JCNS-SNS; JCNS-SNS Neutronenstreuung; JCNS-1 |
Published in: | Macromolecules, 47 (2014) 2, S. 763 - 770 |
Imprint: |
Washington, DC
Soc.
2014
|
DOI: |
10.1021/ma402439v |
Document Type: |
Journal Article |
Research Program: |
JCNS Soft Matter Composites |
Publikationsportal JuSER |
For precise understanding of the dynamics of gels, it is necessary to distinguish the effect of inherent cross-linking from accompanying inhomogeneity. This separation is realized by the use of inhomogeneity-free gel such as Tetra-PEG gel. We investigated the dynamics of Tetra-PEG gel by quasi-elastic scattering. Mesoscopic (length scale: ∼100 nm) motion was measured by dynamic light scattering (DLS). In addition to this scale, we used neutron spin echo (NSE) to measure microscopic (length scale: ∼1 nm) motion. From these measurements, it is revealed that the gels with no connectivity/topological inhomogeneities show the transition from Zimm mode to collective diffusion mode in larger length scale, even beyond the q-range of NSE. In addition to this, the absence of spatial inhomogeneities is reflected as disappearance of nondecay component in the intermediate dynamic structure factor. Through the combination analysis of DLS and NSE, the multiscale dynamics of gels is elucidated. |