- Видео 15
- Просмотров 73 167
Stefanie Sydlik
Добавлен 17 май 2012
Intro to 09 212: Hands on Principles of Polymer and Adhesive Chemistry
Description:
This course is an undergraduate elective chemistry course, aimed to enhance the concepts learned in general and organic chemistry with practical, hands-on experience. We will study polymer science through case-studies with readily available adhesives including: craft glue (polyvinyl alcohol), super glue (cyanoacrylate), wood glue (polyurethane), epoxy and caulk (polysiloxane). The course will cover basic topics polymer chemistry, and include hands-on, fully remote labs centered around each of these adhesives. Organic reaction mechanism, polymerization, viscoelasticity, and polymer mechanics will be covered. Additionally, the course aims to prepare students for undergraduate re...
This course is an undergraduate elective chemistry course, aimed to enhance the concepts learned in general and organic chemistry with practical, hands-on experience. We will study polymer science through case-studies with readily available adhesives including: craft glue (polyvinyl alcohol), super glue (cyanoacrylate), wood glue (polyurethane), epoxy and caulk (polysiloxane). The course will cover basic topics polymer chemistry, and include hands-on, fully remote labs centered around each of these adhesives. Organic reaction mechanism, polymerization, viscoelasticity, and polymer mechanics will be covered. Additionally, the course aims to prepare students for undergraduate re...
Просмотров: 568
Видео
Slime! Polymer Crosslinking Explained in the Kitchen
Просмотров 6 тыс.4 года назад
Professor Stefanie Sydlik shares the organic chemistry behind the making of slime in this polymer crosslinking demonstration. This video is geared towards college students who are out of the lab due to the Covid19 outbreak and are itching to get their hands dirty making some molecules! For those who are less into experimental mixing who want to know a composition that works to make slime, I rec...
Virtual Tour of the Sydlik Lab at Carnegie Mellon University
Просмотров 3444 года назад
Assistant Professor Stefanie Sydlik takes you on a casual virtual tour of her lab.
Carnegie Mellon Chemistry, Mellon Institute Virtual Tour! (Unofficial)
Просмотров 6784 года назад
Assistant Professor Stefanie Sydlik takes you on a casual virtual tour of the Chemistry department in Mellon Institute at Carnegie Mellon University
Explanation of Organic Acids-- pKa Tutorial
Просмотров 3055 лет назад
pKas and origins of acidity with respect to organic chemistry
Video 1: Schlenk Technique for Polymer Synthesis
Просмотров 25 тыс.6 лет назад
Video 1: Schlenk Technique for Polymer Synthesis
please，keep update video. We really need this experimental demo. Great thanks to you. --Y.F. Peng From Dalian University of technology.
Don't touch your phone with gloves - she said and then blow in gloves with her lips))
Она колбу разбила ??? И чему то типа обучает????
Hello I have a question, if we use borax as crosslinking agent, it leaves or breaks the bond after sometime and it turns polyvinyl alcohol into water consistency. Please guide what to do about this?
Science is beautiful!!!
Are there any ways to control the film thickness in this casting methods?
Dr. Sydlik, your channel is awesome! Keep making videos! 😁 Greetings from Georgia Tech.
I I really love how you acknowledge that accidents happen and they are teachable moments, not failings. Thank you for uploading these videos.
I am using Chloroform and Propylene glycol and HPMC but the film is not made please give suggestion of polymer Please Help me i am a student
can anybody tell me how to make thin film of polypyrrole using mcresol????
Giving Stephanie credit for her goodwill in highlighting what she could…This did not show Mellon Institute very well especially since the Library was closed. It should have been planned around open areas. Not many labs were accessed. The deserted halls were not a draw. I worked in Mellon Institute starting in the General Office Technical Secretarial pool (prior to Word Processors and computers doing everything). My typewriter did not have a cover so I could remove keys to put scientific symbols when typing equations. An art form. I was promoted to being a Secretary for three Groups and my office was the first on the right off the elevator on the 7th floor. I met my future husband there when my boss brought him into my office to introduce him. When they left I made a file on him and said to myself “I’m going to marry him someday”! I didn’t even give it a thought as to why I said that! And I did marry him 45 years ago and counting! My time at Mellon was special and I feel I contributed to the work. I went on to work at USC’s School of Engineering in the Dean’s Office when we married and my husband became a Hughes Fellow out in California! I came to USC in the Summer and when the Fall came near, they all talked about “the Trojans”…I asked “What’s a Trojan?”
very clumsy. this person is clearly not used to doing experiments!!! it is too obvious. do us a favor, do not make videos if you are not an expert! maybe you are a professor/researcher but clearly an incompetent one!
Yeah, heat guns are for nerds! Only cool guys use blowtorches. The smell of burning rubber really makes you high.
"dont touch your phone with gloves" - proceeds to put her mouth and blow into the glove
Да, это она прикольно сделала
how much polymer and how much choloroform we have to take ? plse give the quanties
Hallelujah, God Bless you Professor
Amazing explanation!
Thanks :) I’m a researcher working on hydrogens right now I’d love to email you
Thank you very much, but the sound is not good.
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.
Thanks for posting this! Do you have any tips about how to keep multilayer drawdowns from peeling/ bubbling during drawing? My polymer is not very viscous, but I still see a lot of puckering.
Super amazing explanation! Thank you!
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.
Hi can you help me plz I stuck in one project what to do I dnt know u r doctor of chemistry
Means low vescocity after melt
I want some advice from u can u tell me any plastic which melt like water after hearing
Thank you very much, it really helps!
Best to avoid the vac/N2 dance. Just get glassware that has an extra valve somewhere where you can release nitrogen into your fumehood through the glassware then cap it off during your reaction. Keep the nitrogen on and you won't have to worry about aerobic/H2O contamination in the system. I guess if your stuck with a standard RBF you gotta suck and pump.
also the needles are so barbaric imo did the students break all the adapters lol
wait a hot minute if you needed to sparge your mixture at the end then O2 was already in the system and didn't need to be under the schlenk
Do the measurements have an error factor given?
Could you please suggest me ma'am?
I want to doreaction underlow pressure vacuum and nitrogen gas environment
Could you please give me your email id?
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?
Why is this in my recommended
Could you please add the written description of the purification process? It will be easier to understand. Thanks!!
X2 please
Previous time Question What can we do to avoid formation of cross links between spaghetti 🍝???? i need an answer for this question please asap!!!xoxox
Hi! So in spaghetti, those are actually entanglements, since there is not a covalent bond between the spaghetti strands. To avoid this, you can make your spaghetti shorter (break it in two before putting it in the pan)-- this works in polymers too! We call it an entanglement molecular weight. You can also add some oil, to prevent the sticking-- in polymers, this is analogous to adding a plasticizer. Hope this helps!
Awesome! Thank you, I'm not a chemist but have been interested lately in bio polymers and have been searching for information about crosslinking. I tried to make a hydrophobic starch bioplastic using citric acid as a cross linking agent. Would you happen to know what else I could use, it seems the citric acid gives the starch a lot more strength but it isn't hydrophobic yet, just resists a lot more water.
Hi! You could try the boric acid (borax) that we use in this video! Feel free to ask again if that doesn't work. Sorry for my delay!
Hello, thank you for your amazing lesson! I have a question, Can you explain please a bit more about Molecular weight between cross links? thank you
Hi Myrat! Thanks for asking. Molecular weight (in linear polymers) is the length of the polymer molecule strand. In general with linear polymers, the material becomes stronger as we increase this length. In a crosslinked system (thermoset or hydrogel like we create here), we create the new bonds here between boron and oxygen. For these cross linked polymers, we introduce a new factor: the molecular weight between crosslinks. This is the length of polymer chain between each new B-O bond. As the molecular weight between crosslinks decreases (or, more B-O bonds are formed to bind polymer chains together) the crosslinked polymer becomes stiffer. I hope this helps!
@@StefanieSydlik Thank you very much, now I understand clearly, I really appreciate your help!
Thanks, Prof! I enjoyed watching!
Very Helpful! Thanks a lot
Miss my polymer chemistry, plz upload more often as schedule permits!
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
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 !
how can i make a film by using pvdf annd DMF solution, can u please help me?
could you send to me any documentation about films polymer please
hi.. I'm also working on pvdf ferroelectric phase fabrication.. kindly contact me at mati.khan793@gmail.com
Hello.. I am working of polymer composites, Can you guide me?
Yes! Happy to help. My email is ssydlik-at-cmu-dot-edu
Very nice! Your vídeos are really helpful.
How I can prepare a film of PEEK by solution casting
Hello! Many of these comments are on very specific polymer combinations, in which I am not an expert. My advice would be to consult the literature specific to your polymer system!
When Chemists (and others) are lucky enough to stumble on these videos except your numbers to go way up. Good job.
Nice Video, please keep continue posting new videos.