Behaviour of sodium polyacrylate in contact with aqueous solutions in the absence and the presence of ions metal (Ag+,Cu2+,Cr3+) [Comportement de polyacrylate de sodium au contact des solutions aqueuses en absence et en presence d'ions métalliques (Ag+,Cu2+,Cr3+)]

The present work is to study the swelling behavior of sodium polyacrylate (pana) in powder form in aqueous solution. the principal experimental results show that the swell ratio (qeq) of this polymer depends on several parameters (the presence of metal,the change ion-cons,the temperature,the ph of medium ...). indeed,in the presence of distilled water only the polymer is capable of retaining its macromolecular chains between more than 300 times its weight in water. this value decreases with increasing concentration of the supernatant solution of the salt or of the metal. as cons,qeq values increases with less acid ph (qeq=229 at ph=7) and with the increasing temperature (qeq=313 at t=70°c).