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Similarly, polyelectrolytes can be divided into "weak" and "strong" types. A "strong" polyelectrolyte dissociates completely in solution for most reasonable pH values. A "weak" polyelectrolyte, by contrast, has a dissociation constant (pKa or pKb) in the range of ~2 to ~10, meaning that it will be partially dissociated at intermediate pH. Thus ...
Lignosulfonates (LS) are water-soluble anionic polyelectrolyte polymers: they are byproducts from the production of wood pulp using sulfite pulping. [1] Most delignification in sulfite pulping involves acidic cleavage of ether bonds, which connect many of the constituents of lignin. [2]
A polymer electrolyte is a polymer matrix capable of ion conduction. [1] Much like other types of electrolyte—liquid and solid-state—polymer electrolytes aid in movement of charge between the anode and cathode of a cell.
The polymer charge and ionic strength of the polyelectrolyte in question dictate how thick a polyelectrolyte layer will be. The thickness of a polyelectrolyte then affects its adsorption ability. [1] For more information on polyelectrolyte adsorption, look here. Some examples of polyelectrolytes can be found in the table below.
Polyacrylic acid is a weak anionic polyelectrolyte, whose degree of ionisation is dependent on solution pH. In its non-ionised form at low pHs, PAA may associate with various non-ionic polymers (such as polyethylene oxide, poly-N-vinyl pyrrolidone, polyacrylamide, and some cellulose ethers) and form hydrogen-bonded interpolymer complexes. [17]
An example SDS, including guidance for handling a hazardous substance and information on its composition and properties. A safety data sheet (SDS), [1] material safety data sheet (MSDS), or product safety data sheet (PSDS) is a document that lists information relating to occupational safety and health for the use of various substances and products.
A polyelectrolyte is a polymer with repeating electrostatically charged units. In the context of the polyelectrolyte theory of the gene, this polyelectrolyte is a biopolymer—a polymer derived from a living system—with a repeated ionically charged unit, similar to the genetic biopolymer in modern biology, DNA.
Novel chitosan/sodium polyacrylate polyelectrolyte complex hydrogels (CPG) have been fabricated successfully in a study by cross-linking chitosan and sodium polyacrylate with epichlorohydrin (ECH) through the inhibiting protonation effect of chitosan in an alkali/urea aqueous solution. The CPG had a high swelling ratio because of sodium ...