Greetings! I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another thing is I also dissolve PMMA powder in acetone for 15 minutes before the texture hardened. After that, I have to blend all of those solutions together to become homogenous solution.
The questions are (1) I've read some journals which says that PMMA powder should be mixed in a dissolution for 2 hours, but it comes out that only within 20 minutes, the PMMA solution gets hardened at its really difficult to be stirred again. Is this really okay if you just dissolve the PMMA for 20 minutes? (notes: the powder is completely gone actually)
(2) Actually, I've tried to mix those 3 solutions with steps I tried to mix PLA and PCL first for 3 hours and then I mix it with PMMA for another 3 hours. Is it right for me to take this long time to mix all of them? Am I doing it on the right step to mix it all? Is there any unecessary things that I do in mixing those 3 polimers? Is there any other steps to mix all of them efficiently (or with shorter time)?
NB: it would be better if you are also refer or attach the journal when you answer my question.
Thank you in any advance.
It sounds like the molecular weight of your PMMA is really high so the resulting solution is too viscous. Try less PMMA, more solvent, or a PMMA grade with lower MW.
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