Sodium polyacrylate may be produced by the reaction between acrylic acid (H2C=CHCOOH) and its sodium salt (H2C=CHCOONa). The product of this reaction is a long-chain copolymer consisting of alternate units of acrylic acid and sodium acrylate.
Sodium polyacrylate may also be produced by first polymerizing acrylic acid and hydrolysis of the polyacrylic acid with an aqueous sodium hydroxide solution.
Depending on the degree of polymerisation and the technique used you can produce water soluble, relatively short chain length polymers or highly crosslinked “gel-net” polymers.
Sodium polyacrylate may be produced by the reaction between acrylic acid (H2C=CHCOOH) and its sodium salt (H2C=CHCOONa). The product of this reaction is a long-chain copolymer consisting of alternate units of acrylic acid and sodium acrylate.
Sodium polyacrylate may also be produced by first polymerizing acrylic acid and hydrolysis of the polyacrylic acid with an aqueous sodium hydroxide solution.
Depending on the degree of polymerisation and the technique used you can produce water soluble, relatively short chain length polymers or highly crosslinked “gel-net” polymers.
Sodium polyacrylate is an example of a super-absorbing polymer. It is a cross-linked (network) polymer that contains sodium atoms. It absorbs water by a process called osmosis. When the (sodium-containing) polymer is placed in contact with water, there is a tendency for the sodium to distribute equally between the network and the water. That means, some of the sodium atoms want to leave the network and move to the water. When these sodium atoms leave, they are replaced with water molecules. Water swells the polymer network to try to keep the sodium concentration balanced between the polymer and the water. The cross-links that connect the chains together prevent them from dissolving/breaking apart in the water. Sodium polyacrylate can absorb 800 times its weight in distilled water, but only 300 times its weight in tap water, since tap water contains some sodium, calcium and other mineral salts.
Sodium polyacrylate is an example of a super-absorbing polymer. It is a cross-linked (network) polymer that contains sodium atoms. It absorbs water by a process called osmosis. When the (sodium-containing) polymer is placed in contact with water, there is a tendency for the sodium to distribute equally between the network and the water. That means, some of the sodium atoms want to leave the network and move to the water. When these sodium atoms leave, they are replaced with water molecules. Water swells the polymer network to try to keep the sodium concentration balanced between the polymer and the water. The cross-links that connect the chains together prevent them from dissolving/breaking apart in the water. Sodium polyacrylate can absorb 800 times its weight in distilled water, but only 300 times its weight in tap water, since tap water contains some sodium, calcium and other mineral salts.
Sodium polyacrylate may be produced by the reaction between acrylic acid (H2C=CHCOOH) and its sodium salt (H2C=CHCOONa). The product of this reaction is a long-chain copolymer consisting of alternate units of acrylic acid and sodium acrylate.
Sodium polyacrylate may also be produced by first polymerizing acrylic acid and hydrolysis of the polyacrylic acid with an aqueous sodium hydroxide solution.
Depending on the degree of polymerisation and the technique used you can produce water soluble, relatively short chain length polymers or highly crosslinked “gel-net” polymers.
Sodium polyacrylate may be produced by the reaction between acrylic acid (H2C=CHCOOH) and its sodium salt (H2C=CHCOONa). The product of this reaction is a long-chain copolymer consisting of alternate units of acrylic acid and sodium acrylate.
Sodium polyacrylate may also be produced by first polymerizing acrylic acid and hydrolysis of the polyacrylic acid with an aqueous sodium hydroxide solution.
Depending on the degree of polymerisation and the technique used you can produce water soluble, relatively short chain length polymers or highly crosslinked “gel-net” polymers.
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Sodium polyacrylate is an example of a super-absorbing polymer. It is a cross-linked (network) polymer that contains sodium atoms. It absorbs water by a process called osmosis. When the (sodium-containing) polymer is placed in contact with water, there is a tendency for the sodium to distribute equally between the network and the water. That means, some of the sodium atoms want to leave the network and move to the water. When these sodium atoms leave, they are replaced with water molecules. Water swells the polymer network to try to keep the sodium concentration balanced between the polymer and the water. The cross-links that connect the chains together prevent them from dissolving/breaking apart in the water. Sodium polyacrylate can absorb 800 times its weight in distilled water, but only 300 times its weight in tap water, since tap water contains some sodium, calcium and other mineral salts.
Sodium polyacrylate is an example of a super-absorbing polymer. It is a cross-linked (network) polymer that contains sodium atoms. It absorbs water by a process called osmosis. When the (sodium-containing) polymer is placed in contact with water, there is a tendency for the sodium to distribute equally between the network and the water. That means, some of the sodium atoms want to leave the network and move to the water. When these sodium atoms leave, they are replaced with water molecules. Water swells the polymer network to try to keep the sodium concentration balanced between the polymer and the water. The cross-links that connect the chains together prevent them from dissolving/breaking apart in the water. Sodium polyacrylate can absorb 800 times its weight in distilled water, but only 300 times its weight in tap water, since tap water contains some sodium, calcium and other mineral salts.
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