Complex formation of linear poly(methacrylic acid) with uranyl ions in aqueous solutions

Preparation of chitosan nanoparticles using methacrylic acid

“…It can be observed that the absence of the C=O band at 1649 cm −1 , and the presence of two new bands at 1638 and 1545 cm −1 assigned to COO − and NH + 3 groups, respectively, indicate ionic interaction between PMAA and CS associated with the formation of nanoparticles. The bands at 1703 and 1264 cm −1 (C=O) confirm the presence of PMAA [28] in the nanoparticle composition. The increase in synthesis CS concen- Fig.…”

Effect of the crosslinking degree and the nickel salt load on the thermal decomposition of poly(2-hydroxyethyl methacrylate) hydrogels and on the metal release from them

“…Presence of water molecules coordinated to metal ions was observed as a significant weight loss above 200 • C for Zn(II) diols. On the other hand, TG data on complex of poly(methacrylic acid) and uranyl ions showed three-stage decomposition [20]. The first stage took place within the temperature interval 50-258 • C, and it represents overlapping of two processes, one of them is the loss of water molecules bounded to uranyl ions.…”

Utilization of chitosan nanoparticles as a green finish in multifunctionalization of cotton textile

“…absence of the C O band at 1649 cm −1 , and the presence of two new bands at 1638 and 1545 cm −1 assigned to COO − and NH +3 groups, respectively, indicate ionic interaction between PMAA and CS associated with the formation of nanoparticles. The bands at 1703 and 1264 cm −1 (C O) confirm the presence of PMAA [16] in the nanoparticle composition. The increase in synthesis CS concentration leads to nanoparticle chemical structure changes with a sharp decrease in the bands at 1703 and 1264 cm −1 and the concomitant increase in the bands at 1638 and 1545 cm −1 , associated to the relative decrease in the amount of PMAA and the increase in the ionic interaction between PMAA and CS.…”