An Alcogel Based on Poly(2-acrylamido-2-methylpropane sulphonic acid) and the Effect of Neutralization Degree on its Swelling, Thermal and Mechanical Properties

Cross-linked polymeric organogels have attracted much attention in recentyears. Most synthesized organogels are based on low molecular weight ordenderitic materials. The study focuses on the preparation of an alcoholabsorbent organogel based on 2-acrylamido-2-methylpropane sulphonic acid (AMPS)through cross-linking polymerization. Polyethylene glycol diacrylate-400 and ammoniumpersulphate were used as crosslinker and thermal initiator, respectively.Neutralization of acid groups increases swelling in superabsorbents. In this study, theeffect of neutralization degree (N.D) on alcogel swelling was studied. The absorbencyin alcohols and water are unexpectedly reduced with increased N.D. Also, theeffect of N.D on thermal, mechanical and rheological properties was investigated, andfound that increase in N.D leads to increased glass transition temperature, thermal stabilityand storage modulus.