Directions for Making a Polyvinyl Alcohol Solution:

Directions are taken from two books published by POLYED National Information Center for Polymer Education, University of Wisconsin-Stevens Point, Department of Chemistry, Stevens Point, WI -.

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From "Polymer Chemistry Demonstrations and Experiments"

1. Heat approximately 1.7 L of distilled water to 60-70o Celsius. (To hurry this initial heating, use water from a coffee brewer.) Slowly sprinkle 80 g of PVA powder into the hot water with vigorous magnetic stirring. Add slowly so as to avoid clumping of the material.
2. Cover the beaker with plastic wrap and continue heating at60-80o C for 4-6 hours or until solution clears. Do not exceed 80o C. The time for dissolution varies considerably from as little as 1 hour to as much as 6 hours.
3. The solution can be diluted while still warm to 2 L. A small amount of residual solid ("scum") does not seem to effect the performance of the slime.

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1. Sprinkle 40 grams of PVA into 1 liter of water.
2. Heat the mixture and stir over moderately high heat. If it is still cloudy after an hour of heating, turn up the heat but be careful not to burn the solution.
3. Allow the solution to cool before using. If a slimy or gooey layer appears on the top upon cooling, skim it off and discard. Store in a labeled, closed container, such as a two-liter soda bottle.

Mixing Applications

Preparation of Polyvinyl Alcohol (PVA) Solutions

Polyvinyl Alcohol (PVA, sometimes referred to as PVOH) is a water soluble polymer used widely in adhesives, paints, sealants, coatings, textiles, plastics, etc. The polymer is normally supplied in powder form and several grades are available with varying viscosity and solubility characteristics. 

This should not be confused with Polyvinyl Acetate, also known as PVA (sometimes PVAc) which is insoluble in water. PVAc emulsions are also used for adhesives, paints and various coatings but processing is somewhat different. 

The Process

PVA is soluble in hot and cold water. A solution would typically be prepared as follows: 

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• The powder is slowly added to the cold water to avoid formation of lumps, as it becomes sticky and the tendency to form lumps increases as temperature rises. In some cases water at lower than ambient temperature may be used to reduce this risk.
• Once the powder is fully dispersed the mix is heated to the temperature at which the polymer becomes solubilized (ranging from 194ºF to 208ºF - this depends on the grade of PVA used).
• Mixing continues at this temperature until the PVA is fully solubilized. Depending on the grade of material and efficiency of the agitation system this can take some time to achieve.