Ep6 Chain-growth polymerization, radical initiators, kinetics - UCSD NANO 134 Darren Lipomi

Introduction to chain-growth polymerization: initiation, propagation, termination (by combination or disproportionation). Steady-state kinetics.
lipomigroup.org

[@hyunlee4967]

Your channel is one of my favorite KZbin channels. Thank you for these great contents.

[@ari_6624]

Thank you so much for uploading this video! You are such a good lecturer and I'm grateful for technology otherwise I would never have understood these concepts (my professor doesn't explain anything clearly so I get half understanding of everything only...)

[@MrFaiqueShakil]

very nice, greetings from India

[@huonghuongnuquy7272]

very good lecture, nice job ! I'm from vietnam. Thank you

[@chemzard]

Hey! Great lecture, and thank you for sharing it on KZbin. You could have mentioned Oxygen (O2) as one of the more popular radical initiators that is used in the industry (e.g. LDPE manufacture).

[@clarencechoy2382]

Thank you so much for this useful and well-explained lecture! Cheers from Vancouver :D

[@djlipomi]

Thanks! Glad it was helpful!

[@anaa-kb1fs]

weird question but are you studying for the chem 121 final bc same lmao

[@clarencechoy2382]

anna l yes 😂

[@SamNguyen-mz1bt]

Thanks so much, about termination step, what is dominant (combination or disp) b/c polymer mw/ mw distribution will change much depend on two type of termination. And how to control the type of termination. What parameters will effect much to type of termination?

[@patcharapronw.2825]

Thanks for your lecture, I got what I confused

[@rahulkalwade]

How to insure termination of rxn?

[@aliahmad6229]

SIR HOW COULD I DOWNLOAD THIS LECTURE?

[@jimmikater7962]

hey, i am from germany and we would like to stabilize wood with PMMA using Azorbisisubutyronitrile. I see that you are very smart. My question is: For infusing wood with 3000 psi of pressure with the resin, does the molecular weight of the hardener (in this case Azorbisisubutyronitrile) matter?. Since when i used Dilauroylperoxid, the infusion was really hard to accomplish, since the molecular weight is around 400 but the molecular weight of Azorbisisubutyronitrile is around 160. The molecular weight of pure MMA is around 100. My second question is, why do i get good colors with Azorbisisubutyronitrile but bad colors with dibenzoylperoxid as an initiator? Excuse my bad english. I am more a woodworker than a smart guy. Best Regards, Ebrahim from Germany

[@fabriziot1467]

2° question: Bad color can came from a monomer stabilizer (hydroquinone) or initiators that have oxigen. There are many side reactions that involve iniziators and polimers chains, not a simple task. 1° question: lower the quantity of AIBN, or think to make a heat curing. I konw that someone use a oven.

[@fanatastica3249]

Hey, you say that radical is always chain growth but isn’t Thilo-ene click chemistry radical and considered step-growth? Btw, thanks for your lectures. I have to study this all by myself right now and your lectures are such a great addition to the books I’m using.

[@djlipomi]

Touché! And thanks :)

[@pattersonpolymerproject440]

Where can we find the exams from 2015 and 2016? Are they online by chance? : )

[@djlipomi]

Unfortunately I'd prefer to keep this content private for now.

[@pattersonpolymerproject440]

Totally understandable. Genuinely appreciate the informational uploads it really helps a lot. : )

[@AndreyAntonchik]

When they named the backbiting name they knew exactly what they were doing lol