Yes, adding glycerol to a polyvinyl alcohol (PVOH) solution can effectively plasticize the material and improve its flexibility. Glycerol works by reducing intermolecular forces between PVOH chains, making the polymer more flexible and less brittle. It is a commonly used plasticizer in water-soluble films, including PVOH.

Here are a few steps you can follow to plasticize PVOH using glycerol in solution:

By varying the amount and type of plasticizer, you can adjust the final properties of the PVOH film, including flexibility, transparency, and mechanical strength.

Thank you very much Raghad, I will try based on your recommendations