抄録
The swelling is an increase of volume of material due to absorption of a solvent and is an important phenomenon in soil and gel sciences. We have investigated the swelling behavior experimentally, using cross-linked polyacrylic acid sodium hydro gel which has three-dimensional cross linked polymeric structure. The swelling behavior was studied under two experimental cases. One is swelling under load to polymer gels and the other is swelling under contact of two different gels. It was found that both cases of the load to gels and gels diffusion in another gels reduced swelling because diffusion of polymer chains was restricted.
