| abstract |
The hydrogel includes a first network structure and a second network structure. The second network structure is intertwined with the first network structure. The first network structure includes a polymer crosslinked with the first crosslinking agent. The second network structure includes a polymer crosslinked with a second crosslinking agent. In the first crosslinking agent, 50 mol% or more does not contain a decomposable bond. In the second crosslinking agent, 50 mol% or more does not contain a decomposable bond. |