How to precipitate polymer with methanol

Pour directly into the methanol, the amount of amount is not necessarily according to the literature. If you do too much, you will probably know. After the precipitation, it is dissolved with chloroform and the methanol is precipitated 2-3 times. The product should be very pure

Stir with glass rod while pouring methanol

I just did the ether precipitated polyethylene glycol derivatives today. I feel that the experimental operation is very simple. I feel that it will be placed in the freezer of the refrigerator for a while and then filter. The effect will be better.

It should be poured your synthesis into the methanol. They should be insoluble. After pouring in, they will settle out, and then filter

Our side is added with a dropper drop

Personal experience: Slowly drip the polymer solution into the methanol, the slower the better, and then stir for a while
This ensures that the polymer is more loose and dry after the later filtering, and it is not easy to be too thin.

The methanol used for precipitated is 10 times that of the polymer solution.
Generally, the polymer solution is dripped into the mixed methanol. The slower the drop, the better