Polyurethane Foam
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- Chances are, sometime today you have used a product containing polyurethane foam. Discover its amazing properties!
This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - elearning.flinn...
ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.
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why isn't the audience laughing? he's so funny! this is awesome!
This gives a new meaning to foreplay and calculus.
How can I get my hands on some A and B stuff? I asked at Lowe's which Isle A and B is and they looked puzzled then asked me if it was a cleaning agent. I said it wasn't because A is in a separate bottle than B and is cheaper buying it that way than it is to buy a bottle of C which is premixed. More puzzed they looked then asked if it was something like Auto Antifreeze. I just gave up, threw my hands up, and walked out. So, here I am again and still can't find where to get any...
"I can do it digitally...to two significant digits".
Pure Gold.
Idk how the audience was so quiet i lol’d throughout this presentation.
I understand this is supplier's demo, but i'd really like a complete lecture instead :(
Does this reaction cause fumes that are toxic or could be an irritant to the respiratory system?
No.
Where did you get your t shirt? it’s amazing!! Need!
I really just googled calibrated goggles I’m so mad 😡
Your t-shirt is sick Sir
Reminded me of Dr. Waltwr Lewin from MIT
Dear teacher, you are now dealing with ready-made commercial mixes, but can you manufacture flexible polyurethane foam from its basic components and reveal the secret of commercial mixes?
Dzień dobry. Chciałbym zrobić lakier uretanowy na bazie diizocyjanianu heksametylenu. Jaki poliol (glikol) zalecasz?
What is the name of A and B?
uretane resin and Isociunarate, wich creates polyisociunarate, commonly known as polyurethane foam
Yeah, but what does B + A = ? Got ya stumped right!
What is Elastopor H1300/22/p050
its Kind of polyurethane .
Please i need expliquation
Probably 1,4 diisocynate (diphenylmethane) (a) and polyeterpolyol consisting tertiary amine as catalyst and silica as surfactant (b)
What are A and B?
Cellicon VN I’m guessing an isocyanate and a polyol maybe with some kind of hardener and/or additives
pee and poo
I cant find a and b online, any help?
Here is a link to the kit used in this demo (with "a" and "b" chemicals included): www.flinnsci.com/store/Scripts/prodView.asp?idproduct=18034
Just look up boat foam
Mixing chemical based on the volume of product? How much to mix for volume?
50/50 mix..... ?
WHAT is with the green head band?
+Johnny Wewoka It's the strap to his goggles.
FlinnScientific OOOOK LOL
Too bad they didn't show the glove blow up entirely. Would have loved to see that.
Is it toxic?
Wow!!!
hi
i want to know about this video ( th-cam.com/video/f5hGoOrGGqk/w-d-xo.html) what kind of polyurethane he used and what is the way to do like this
Z
Crap!
Such sloppy work, of course you are a professor so it’s just fine. Personally I would have enjoyed a talented forth grader.