High water absorbent resin can absorb several hundred times and several thousand times as much water as its own weight

owning to its high capacity for absorbing water

high degree of water retention under pressure

High water absorbent resin was a three - dimensional network polymer

it was polyelectrolytes. Polymer chains making up the network cantain ioniz- able group and mobile electrolyte ions. The concentration of mobile ions will always be greater in the gel than outside because

Consequently the osmetic pressure of solution inside will exceed that of the external solution. The water absorbem mechanisms of high absorbent resin was explicated by thermodynamic formulation of Flory - Hoggins.