Abstract:Although studies of charged hydrogel swelling focus on the swelling transition, hydrogels display pre-transition swelling which may affect their performance in applications such as sensors. In this paper we investigate the effect of system parameters on the pre-transition swelling of charged poly methacrylic acid (PMAA) hydrogels. We find that the pre-transition swelling can be quite significant in magnitude (in our case 40% of the maximal swelling). Increasing the sub-chain molecular weight increases swelling… Show more
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