Great video with good detail. Wish it had a description of the experiment. If you need an intro on Schlenk line operations watch the beginning. If you're interested in the polymerization reaction skip to 9:30. Summary: Goal is to synthesize PBMA (poly butyl methacrylate). the following were mixed together under nitrogen. 11.2 mL of monomer (N/A) 0.055 mL of ethyl bromoisobutyrate ____ mg Copper romide catalyst 2 ml toluene
I mean, didn't all your vacuuming efforts go to waste once you took the cap off? You could have just added all the ingredients with the cap off and then just seal the flask and purge the solution with nitrogen for 10 minutes and that would replace the oxygen both in the solution and in the flask.
She stated at the beginning of the video that oxygen will interfere with the catalyst, thus you need to do everything under nitrogen at first. Then you can remove the cap because I suppose the final polymeric product is NOT air-sensible, as in the case of the catalyst
I was wondering the same thing and I'd assume it probably didn't go to waste completely, since there still was a slight overpressure of nitrogen in the flask and gases aren't mixing awfully fast... However considering that the solution wasn't purged before adding the copper bromide and it itself having been out in the air for quite a while, it seems kind of unnecessary. I guess, it was meant to teach students, how to actually do the whole process of setting up an inert environment in a flask, without it actually being too harmful for the reaction, if they don't execute it perfectly.
The glove colour is less 'be-cha' compared to the other ones in other video-clips. Colourings make things more appealing. As I see what I see I want to quantum leap to other video-clip: what are the chemical compounds that factories use to make colourings. Is it safe for our health/lasting/etc.
As I use this h'phone my small daughter age 7 watch something else. Room locked. Cartoon with striking lights. They (the children) know their father's password! I mean small children focus as their father write password, quickly they memorize it.
Hi there, I am currently working on anionic polymerization, but it still doesn’t work very well, could you please show me the techniques to create an air free and water free environment before adding the initiator？thank you very much !
hey. i am working on synthesis of polyurethane. i used acetone as solvent but it doesn't work good. can you please suggest me the best solvent for polyurethane synthesis.
I I really love how you acknowledge that accidents happen and they are teachable moments, not failings.
Thank you for uploading these videos.
Great video with good detail. Wish it had a description of the experiment. If you need an intro on Schlenk line operations watch the beginning. If you're interested in the polymerization reaction skip to 9:30.
Summary:
Goal is to synthesize PBMA (poly butyl methacrylate). the following were mixed together under nitrogen.
11.2 mL of monomer (N/A)
0.055 mL of ethyl bromoisobutyrate
____ mg Copper romide catalyst
2 ml toluene
Is it not obvious that the monomer is butyl methacrylate?
Amazing explanation!
Very Helpful! Thanks a lot
Do the measurements have an error factor given?
I mean, didn't all your vacuuming efforts go to waste once you took the cap off? You could have just added all the ingredients with the cap off and then just seal the flask and purge the solution with nitrogen for 10 minutes and that would replace the oxygen both in the solution and in the flask.
She stated at the beginning of the video that oxygen will interfere with the catalyst, thus you need to do everything under nitrogen at first. Then you can remove the cap because I suppose the final polymeric product is NOT air-sensible, as in the case of the catalyst
@@matchem9178 She removed the septum when adding the third reagent before the reaction had even taken place.
@@matchem9178 the copper bromide she added with the cap off is the catalyst
I was wondering the same thing and I'd assume it probably didn't go to waste completely, since there still was a slight overpressure of nitrogen in the flask and gases aren't mixing awfully fast... However considering that the solution wasn't purged before adding the copper bromide and it itself having been out in the air for quite a while, it seems kind of unnecessary. I guess, it was meant to teach students, how to actually do the whole process of setting up an inert environment in a flask, without it actually being too harmful for the reaction, if they don't execute it perfectly.
The glove colour is less 'be-cha' compared to the other ones in other video-clips. Colourings make things more appealing.
As I see what I see I want to quantum leap to other video-clip: what are the chemical compounds that factories use to make colourings. Is it safe for our health/lasting/etc.
As I use this h'phone my small daughter age 7 watch something else. Room locked. Cartoon with striking lights. They (the children) know their father's password! I mean small children focus as their father write password, quickly they memorize it.
Hi there, I am currently working on anionic polymerization, but it still doesn’t work very well, could you please show me the techniques to create an air free and water free environment before adding the initiator？thank you very much !
hey. i am working on synthesis of polyurethane. i used acetone as solvent but it doesn't work good. can you please suggest me the best solvent for polyurethane synthesis.
DMF
Hello..
I am working of polymer composites,
Can you guide me?
Yes! Happy to help. My email is ssydlik-at-cmu-dot-edu
Why is this in my recommended
Yeah, heat guns are for nerds! Only cool guys use blowtorches. The smell of burning rubber really makes you high.