What is the density of poly(acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate?

Poly (acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate are both superabsorbent crosslinked polymers having a density of 0.54 g/mL at 25 °C [25, 26]. Figure 3 shows the repeating terms of the chemical structures of both poly (acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate used in this study.

Do sodium polyacrylate and potassium salt swell?

This study experimentally evaluated the swelling performance of two SPHs, poly (acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate, based on their stimuli response to pH, salinity concentration, temperature and reaction time periods. Several important conclusions have emerged:

What is the swelling behaviour of acrylamide-co-acrylic acid potassium salt and sodium acrylate?

As illustrated on Fig. 10, the swelling behaviour of the poly (acrylamide-co-acrylic acid) potassium salt and sodium acrylate typically demonstrate maximum swelling between pH 6.5 (neutral medium) and 9 after free swelling at 25 °C for 2-, 4- and 6-h.

Are potassium salt and sodium polyacrylate superabsorbent crosslinked polymers?

Photographic image of a poly (acrylamide-co-acrylic acid) potassium salt and b sodium polyacrylate Poly (acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate are both superabsorbent crosslinked polymers having a density of 0.54 g/mL at 25 °C [25, 26].

How is polyacrylamide-CO-sodium acrylate prepared?

Learn more. Polyacrylamide-co-sodium acrylate has been prepared via copolymerization of acrylamide and acrylic acid, or the hydrolysis of a pre-formed nonionic polymer. Both macromolecules had a charge of 24 mol% with a molar mass of 25 million g/mol.

Which polyacrylate has the highest absorbency?

As shown in Fig. 9 c, after 6-h of free swelling the poly (acrylamide-co-acrylic acid) potassium salt experienced its peak absorbency (294 g/g) at 50 °C and lowest (204 g/g) at 100 °C. While the sodium polyacrylate exhibited a similar swelling behaviour, at 25 °C it demonstrated its highest absorbency (293 g/g) which decreased (264 g/g) at 50 °C.