Hello
I dissolve PVDF using DMaC/Acetone(1/1 and 6/4 mixture) and heated to 60 degrees to melt well.
And the solution was used for electrospinning, and the solution was cooled.
When i want to use the solution again, I raise it back to 60 degrees, but the solution doesn't become clear...
I don't know Why the PVDF solution doesn't melt again..
If you know, Please help me..
Dear Hyunjung Cho, in the first trial PVDF is a powder or pellets, it solubulizes easily with the help of temperature because surface area is high. However, after cooling PVDF becomes a mass with low surface contact with the solvent, it took longer time to diffuse, so I think extended time is needed to resolubilize it again. My Regards
Thank you for answering.
When i dissolve PVDF pellet first time, the solution stirred about 5hours.
And I tried to melt it again, I stirred the solution about 2 days or more.. but it still seems unclear solution..
Always The temperature was the same while stirring..
I am not good at chemistry.. so I don't know that situation..
My suggestion is to grind the mass and redissolve it again. There will be some changes due to the mechanical degradation. This may help you to continue your work. My Regards
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