By using small-angle X-ray scattering and dynamic light scattering, pH-responsive swelling behavior of the core part of PEGylated nanogels was investigated. The swelling behavior depended on the cross-link density of the core part. When the cross-link density was small, the core swelled with keeping the polydispersity in size and shape constant; to the contrary, the core hardly swelled and only the polydispersity increased when the cross-link density was large. This difference in the swelling behavior is discussed in terms of inhomogeneous structural distribution of cross-links in the core.
- Goshu Tamura
- Yuya Shinohara
- Yoshiyuki Amemiya
