The water swelling elastomer (WSE) is a new type of sealing materials for water′s stopping

which was developed in the later of seventy′s and used comprehensively in dams

undergrounds of building

tunnels

subways and so on.It was very important how to solve the problem that the hydrophilic component can be solved out from WSE in water.The results obtained in our former experiment showed that the problem could be solved successfully by covulcanizing method.The swelling behavior of three kinds of WSE in still water

toluene

and different salt solutions were studied.The results obtained in water showed that the swelling behavior of PHPAM-WSF

PAANa-WSE and PEU-WSE were all agreed with first order kinetic equation as ln[(Qe-Qo)/(Qe-Qt)]=Kt and the Ea value of PHPAM-WSE was 19.5kJ/mol.The Qe decreased with increasing amount of crosslinking agent S during the swelling in toluene.The results from the effect of different kind of hydrophilic component on swelling behavior showed that the order of swelling specd was PEU>PHPAM>PAANa

while the swelling degree to reach Qe PHPAM>PEU>PAANa.The results gained from the effect of pH of solutions on the swelling behavior showed that the Qe of PEU-WSE was affected lightly by pH

while the Qe of PHPAM-WSE and PAANa-WSE were heavily influenced by pH.The effect of different metal ions on the swelling behavior were also studied and the results were that Qe value was maximum in distilled water and minimum in Portland cement water solution

the PEU-WSE almost wasn't affected by cation's charge number while the Qe of PHPAM-WSE was decreased dramatically with the increasing of cation's charge number.