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How is polyvinyl alcohol made?
Polyvinyl alcohol (PVA) is made by the hydrolysis of polyvinyl acetate, which involves breaking down the acetate groups in polyvinyl acetate to form the alcohol groups in PVA. This process typically involves the use of a catalyst and water to facilitate the reaction. The degree of hydrolysis determines the properties of the resulting PVA polymer.
Why is heat needed to assist in dissolving polyvinyl alcohol?
Heat is needed to assist in dissolving polyvinyl alcohol because it increases the kinetic energy of the solvent molecules, allowing them to break the intermolecular forces holding the polymer chains together. This results in a faster and more thorough dissolution of the polyvinyl alcohol in the solvent.
Does mixing borax and polyvinyl alcohol result in a chemical change?
Mixing borax and polyvinyl alcohol does not result in a chemical change. Instead, it forms a physical change known as cross-linking, where the borax molecules create bonds with the polyvinyl alcohol molecules to form a flexible slime-like material.
Why do people get drunk so easily with an empty stomach?
When the stomach is empty, alcohol is absorbed more quickly into the bloodstream, leading to a faster rise in blood alcohol concentration. This can result in people feeling the effects of alcohol more quickly and becoming drunk more easily. Eating before drinking can help slow down the absorption of alcohol and reduce the likelihood of getting drunk quickly.
What is the chemical name of PVOH?
PVOH is one abbreviation (though probably not the most common) for poly(vinyl alcohol).
