Why is PVA difficult to get into solution? Please elaborate.
PVA has low solubility in non-volatile solvents. Depends on what you are trying to dissolve it with. If you bought a pre-made solution, you obviously will not have a problem. In water, a 20% solution takes forever to make. You will have to put it on constant stir with low heat in order to get it into solution. Usually takes overnight and a stir/hot plate and some magnetic stir bars.
If you are making a lower percent solution w/v then you might have better luck. Let me know if you have any issues and I can give you some 20%w/v that would be usuable.