I am using distilled water at 60 C but still it is unmixed. Recently i used DMF also with heating at 60 C from some reference ...but i failed
What might be reasons behind this , kindly help me ...
Dear Anil,
For making aq. PVA solution, take PVA and distilled water in required amount in a beaker on the magnetic hot plate at 80-90C with continuous stirring. Cover the mouth of the beaker with aluminum foil to the vaporization of the solution. After 5-6 h of stirring you will get a clear solution, i.e. PVA is dissolved. It takes only a few hours rather than one day.
Dear Anil,
You can try some of organic solvents to solubilize PVA as follows :
1. Dimethyl sulfoxide (DMSO): it can dissolve PVA with lower degree of hydrolysis
2. Mixture: Ethylen glycerol (EG) 15.97 % (volume) and Hexylene glycol 84.03 % (volume)
Good luck
Water is supposed to dissolve PVA. However, if you have a high molecular weight grade you will have to boil it. Try to avoid the formation of larger lumps by thorough stirring.
First you can heat your PVA at 40C and water nearly ~80C for half an hour, Now add PVA into water with constant magnetic stirring. And finally place your solution in oven at 80C for 2 hours. Keep it more than 1 days for complete dissolution.
Dear Anil,
For making aq. PVA solution, take PVA and distilled water in required amount in a beaker on the magnetic hot plate at 80-90C with continuous stirring. Cover the mouth of the beaker with aluminum foil to the vaporization of the solution. After 5-6 h of stirring you will get a clear solution, i.e. PVA is dissolved. It takes only a few hours rather than one day.
The solvents of PVA (polyvinyl alcohol): water by the temperatures 70-80 C, water + acetone.
A solubiliti of PVA depends strongly from acetone
residual content of acetate groups.
does PVA dissolve in Chloroform and cyclohexanone? how long it will take to dissolve?
I have been dissolving PVA in MiliQ water on a magnetic stirrer for 10-15 min at room temperature. It does get dissolve & clear solution is obtained. (concentration of PVA is 1%)
Dear Mr. Anil Arya
Greetings
May I know which method you choose to dissolve PVA? which solvent and the rates.
Thank you with best regards
Fayroz
Does PVA dissolve in chloroform ? and how long it will take to dissolve?
Dear Anil,
If you are unable to dissolve the PVA In the water at 80 Degree Celsius then try at 110 Degree Celsius because, the 80 Degree Celsius of magnetic stirrer are equal to 60 Degree Celsius. It may give you expected results. Also You can check in oven at 80 Degree Celsius.
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