Ehsan Zarshenas

4 Questions 2 Answers 0 Followers

Questions related from Ehsan Zarshenas

I distilled off dichloromethane from a mixture of epichlorohydrin/dichloromethane. How can I confirm all DCM is gone?

I distilled off dichloromethane (DCM) from a mixture of epichlorohydrin (ECH)/DCM. How can I confirm all DCM is gone? I would appreciate if someone suggest me any better separation method rather...

09 June 2019 1,838 3 View

Any good NMR solvent to dissolve PAA-b-PNIPAM?

To characterize my synthesized block copolymer PAA -b-PNIPAM (PAA=Polyacrylic Acid), I need to take the NMR test. DMSO was the only solvent I found on literature. But I couldn’t get it dissolved...

29 November 2018 4,268 2 View

What is the white precipitate that forms when I add Acetone to (DI Water+Na2CO3)?

I use 15% Sodium Carbonate solution for my research. When I wash the glassware with Acetone, a white precipitate would form on the wall. Any idea what that might be?

29 November 2018 4,643 3 View

How can I purify PtBA-b-PNIPAM block copolymer?

In other words, how to separate NIPAM monomers from PtBA-b-PNIPAM after copolymerization? I've already precipitated in cold hexane, monomers are still there though.

15 September 2018 7,628 2 View