Differences between free radical and controlled radical polymerization. Details of atom-transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. lipomigroup.org
Пікірлер: 38
@vyshakmp33593 жыл бұрын
Bonjour Professor, Thank you so much for explaining the controlled radical polymerization techniques, especially RAFT polymerization. It helps a lot, please keep posting good lectures like this.
@djlipomi3 жыл бұрын
Glad it was helpful!
@snowmister25 жыл бұрын
Surprising lack of youtube videos on RAFT. Super cool mechanism - it seems underappreciated. Thank you for sharing!
@djlipomi5 жыл бұрын
Thanks!
@guikeenan3 жыл бұрын
I like the lecturing style of Prof. Lipomi in general! There are however a coupe of issues here, Just two now: - A wrong statement on the evolution of the average molecular weight in free-radical polymerization ("hockey stick"). This metaphor is valid for step-growth polymerizations. For free-radical polymerization, Mn = f(conversion) is a slowly decreasing curve, since long chains (but never as long as what RDRP/CRP can achieve at high conversion) are formed from the start and chains continuously initiated and quickly terminated become progressively shorter (as monomer concentration decreases). - NMP is actually quite tolerant to functional groups. ATRP not much more, could be less in fact (acrylic acid for instance does not work by ATRP, as opposed to NMP). NMP presents indeed the disadvantage to not (well) work with some monomer types due to nitroxide-based H-abstraction. And a further downside is the required thermal activation, which can sometimes be unpractical. Other than that, this is a pretty versatile method too. Why isn't it used more (vs ATRP or RAFT polymerization)? The good nitroxides are not commercial.
@gavinirvine27256 жыл бұрын
Very useful, thanks for posting these. Started a PhD at Queen's University Belfast recently and this provided a good background into RAFT.
@djlipomi6 жыл бұрын
Awesome, thanks! And good luck.
@AndyU962 жыл бұрын
Hey darren, thanks for your touch on the point of the CN group, you better not be lying.
@subalchandramandal51962 жыл бұрын
Excellent dear Sandipan
@plh82199 ай бұрын
Thanks a lot for your lectures, which is super helpful to me for learning Polymer Chemistry ❤❤❤
@natap.86816 жыл бұрын
Thank you so much !!!! Greeting from Thailand.
@djlipomi6 жыл бұрын
You're welcome! Glad you find the videos helpful.
@joeyling58424 жыл бұрын
Hi thank you so much for your videos they are truly the best ! I was wondering if you could explain more about the NMRP and TEMPO being unable to be used on polar monomers :) THank you
@subalchandramandal51962 жыл бұрын
Thanks for your lecture in Hindi.
@subalchandramandal51962 жыл бұрын
It is quite interesting to note polymerisation of bromide
@iemrun15 жыл бұрын
i hope i can pass my QE this end of month.thanks well explains and so much better than my profesor haha
@djlipomi5 жыл бұрын
Thanks and good luck!
@trinhthien4265 жыл бұрын
thank you so much for helful videos. I am really fascinated by your excellent lectures, you are a great teacher.
@subalchandramandal51962 жыл бұрын
Excellent Prof
@FantasticHermitCrab2 жыл бұрын
"It generates the radical by sucking the bromine off." -Dr. Darren Lipomi, 2017
@Baribal883 ай бұрын
Nice stuff, THX
@Mtj6223 жыл бұрын
Your videos are so incredibly helpful, thank you!
@djlipomi3 жыл бұрын
Thanks! Glad they are useful.
@SakurabaAyane4 жыл бұрын
Aha! The 7th episode seems to be missing from the playlist.
@subalchandramandal51962 жыл бұрын
What's the function of initiator?
@marfluca3 жыл бұрын
Excellent, thank you very much, warm regards from Equator.
@josesuarez83853 жыл бұрын
que haces aquí fred jajaja
@marfluca3 жыл бұрын
@@josesuarez8385 JAJAJAJA queriendo entender algo de síntesis :(
@marfluca3 жыл бұрын
@@josesuarez8385 JAJAJAJA queriendo entender algo de síntesis :(
@Chemsci-j1v3 жыл бұрын
such a great group of lectures. But seriously, who cares if someone is on their phone? If my profs were so stressful, id just skip the lecture and watch the video. Listen if you want, don't if you don't. It's their schooling.