How to precipitate the polymer from the solution system?

What solvent do you use?Try petroleum ether or ether

The principle of the sediment is that it is dissolved with your solvent, but it cannot dissolve your polymer

The preferred polymer is solid form, and it can be precipitated to precipitate in the ethanol and water system. One you need to pay attention to is the amount of ethanol and water solvents.The temperature of the time, the estimation of poor solubility needs to be frozen to a certain temperature. According to your sticky shape, the temperature should be relatively high, reduce the precipitated temperature