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Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer. It has the idealized formula [CH 2 CH(OH)] n. It is used in papermaking, textile warp sizing, as a thickener and emulsion stabilizer in polyvinyl acetate (PVAc) adhesive formulations, in a variety of coatings, and 3D printing. It is colourless (white) and odorless.
As soon as the dishwasher pod comes into contact with hot water, it begins to dissolve, ... of plastic also known as polyvinyl alcohol. ... on most pods is supposed to be 100% water soluble, so ...
“Laundry and dishwasher pods contribute, as they typically are wrapped in a petroleum-based polyvinyl alcohol plastic (PVA or PVOH), which dissolves in water,” Nelson says.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Polyvinylpyrrolidone (PVP), also commonly called polyvidone or povidone, is a water-soluble polymer compound made from the monomer N-vinylpyrrolidone. [1] PVP is available in a range of molecular weights and related viscosities, and can be selected according to the desired application properties.
The dissolvable packets are typically made of polyvinyl alcohol (PVA) or a derivative of PVA. Although the formulas are similar, the concentration varies; the liquid components of a detergent pod may contain 10% water compared to 50% in liquid detergents. [2] The film is designed to be soluble in cold water. [3]
Polyvinyl acetate used further for polyvinyl alcohol is manufactured by radical polymerization in methanol solution. Liquid polybutadienes are made by anionic or radical polymerization in hydrocarbon solutions. Butyl rubber (IIR) by low temperature cationic copolymerization of isobutylene with isoprene in ethylene or methylchloride solution.
The film in Tide Pods is a polyvinyl alcohol film developed by MonoSol which is intended to dissolve in any temperature water. The pod detergent is also 10 percent water by volume compared to liquid Tide detergent which is 50 percent water by volume. This was done to prevent the pod from melting from having high water volume.
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