Ep4 Step-growth polymerization, Carothers equation, molecular weight - UCSD NANO 134 Darren Lipomi

Step-growth polymerization (vs chain growth, to be covered in more detail later in the course), extent of reaction, number-average degree of polymerization, control of molecular weight (interfacial polymerization, increasing the temperature and decreasing the pressure gives higher MW, stoichiometric imbalance and modified Carothers equation).
lipomigroup.org

[@moviestarinternational2783]

What an amazing explanation! My teacher just gave us equations and points without any vivid explanations, which is very tedious. Thanks a lot !

[@danielf7743]

not often do i watch an entire video of 50 minutes. Well done on the explanation!

[@djlipomi]

Thanks Daniel!

[@FallenAngelAbaddon]

Thanks a ton Darren. The lecture is highly understandable and provides simple answers to the questions I had.

[@djlipomi]

Thank you!!

[@trinhthien426]

Thank you so much for immensely informative and helpful lectures. You are great lecturer with excellent explanation.

[@djlipomi]

Thanks!

[@lisati2258]

What a Great Video! Your explanations are so easy to understand. Thank you!!

[@djlipomi]

Thanks for the kind words and glad it was helpful!

[@austineromosele8481]

Great explanation

[@manojpandey7517]

It was a very good lecture, sir. Wish there were more lectures on Polymer Science from you.

[@sabbirkhanvlogs2206]

I am watching from India 👍

[@crayonmunch]

Thank you, your explanation of Carothers was excellent and very helpful.

[@djlipomi]

Thanks!

[@omitpaijapun9029]

Sir, you really have a good way to explain things. Thank you!

[@djlipomi]

Most welcome!

[@antoniojedsoncaldeirabrant6681]

A very good lecture with clearly understandable explanation!

[@djlipomi]

Thanks a lot!

[@wardeathshot]

respect from pakistan thank you so much sir

[@manelestanyjane1580]

Dear,
In 13th minute, I have a doubt about the relation Molecular weight - Conversion with the chain growth polymerization uncontrolled. Why are you assuming is going to have the same behavior as step-growth? I've checked other references and it says that in chain growth, the Molecular weight increases with lower values of conversion and it maintains high. In my opinion, this second theory have more sense because of the high molecular weight the "semi-macromolecules" reacting with initiator they already have.
Thanks a lot.

[@mdmazbahuddin5592]

how Xn=2? Can you please comment in details

[@ghulammustafanarejo9261]

How can I get supplements or addictional material for this course which professor has mentioned in the beginning?

[@SakurabaAyane]

You really imported them from Japan? XD I do the same with my stationery, every time I go back I don't find the chance of buying them in-store.

[@serkann87]

thank you, it is very helpful !

[@djlipomi]

Thank you!

[@brendansullivan4872]

5:49 even chuck lidell tuned in

[@renzoearltubola6536]

papi