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Relaxation modes in chemically cross-linked poly(2-methacryloyloxyethyl phosphorylcholine) hydrogels
| Content Provider | Semantic Scholar |
|---|---|
| Author | Goda, Tatsuro Furukawa, Hidemitsu Gong, Jian Ping Ishihara, Kazuhiko |
| Copyright Year | 2013 |
| Abstract | We investigated the relaxation modes of autocorrelation functions obtained by dynamic light scattering (DLS) of chemically cross-linked zwitterionic hydrogels comprising poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) as the main chain of the network. A time- and space-averaged (i.e., an ensemble-averaged) autocorrelation function was obtained using a home-built DLS apparatus enabling automated positioning of a sample. The equilibrated hydrogels exhibited fast and slow relaxations; the former was derived from thermodynamic fluctuations of the polymer network whose cross-link distances were modeled by the Stokes–Einstein equation, whereas the latter depended on cross-linking densities, cross-linker type, and external electrolytes in the hydrogels, suggesting a mesoscopic weak segment–segment interaction driven by electrostatic forces or by the salting-out effect. These observations may aid in the regulation of network integrity and hydration state of the polymer in PMPC hydrogels. |
| Starting Page | 2166 |
| Ending Page | 2171 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C2SM27284A |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/sm/c2/c2sm27284a/c2sm27284a.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C2SM27284A |
| Volume Number | 9 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
