Can any one suggest a solvent for the precipitation of polymer (copolymerised vinyl pyridine and vinyl imidazole) from DMSO.
Water or alcohols like methanol or ethanol are commonly used to precipitate a copolymer of vinyl pyridine and vinyl imidazole from DMSO.
Sir ,I tried water, ethanol, methanol, acetone, ethyl acetate, cyclohexane but still no results
You could try diethyl ether, hexane, petroleum ether, mixtures of solvents (like water and ethanol), cooling the solution, increasing concentration, or adding a salt like ammonium sulfate to induce precipitation.
Yes sir i tried this combination too,I am preparing anionic exchange membrane using this polymer as back bone, adding of ammonium sulphate may alter the nature of tertiary amine in the polymer, won't it get quartenised
You're right, adding ammonium sulfate could potentially quaternize the tertiary amine groups in your polymer, which could affect the properties of your anionic exchange membrane. If you're concerned about altering the chemical nature of the polymer, it's best to avoid using salts that could react with it.
In that case, you might want to focus on solvent-based methods for precipitation. You could try experimenting with different solvent mixtures or adjusting the temperature of your solutions to see if that helps with the precipitation without chemically altering your polymer.
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