GCSE Chemistry - Condensation Polymers (Polyesters) #60
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- Опубликовано: 26 июл 2024
- This video covers:
- What condensation polymers are
- How they're made from dicarboxylic acids and diols
- How the monomers join together (ester bonds)
- How to write the equations
- Why condensation polymers are more biodegradable than addition polymers
Exam board specific info:
AQA - Separate/triple science and higher tier only
IGCSE Edexcel - Separate/triple science and higher tier only
Edexcel - Separate/triple science and higher tier only
OCR 21st Century - Separate/triple science and higher tier only
OCR Gateway - Separate/triple science and higher tier only
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
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Amadeus & Tom
I believe there is an error on the condensation polymer at around 3 minutes there is a missing oxygen bond on the c in the final polymer
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this helped me clear all my doubts on condensation polymerisation!! thank you so much for your hard effort. i was wondering if you also made a video on making polyamides, I'm still confused about that part. thank you!!
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what a fantastic illustration of the polymerization process! much appreciated for the insights.
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Why do we need 2 functional grps?
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Can u pls tell me whether all condensation polymers are copolymer??
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Happy to help!
watching this on the morning of the gcse idk WHAT ill do if i fail
how much did u get?
I'm so curious why 2H₂O Molecules are produced per repeating unit...?
because theres a double condensation meaning 2 water molecules are produced, the first one when the first pair of OH (from the dicarboxylic acid) and H (from the diol) leave their structures and the second when the same thing happens with the pairs of the other end of each structure
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why does the acid give up its hydroxide ion instead of the alcohol even though both of them have hydroxide ions?
Good question
Because ethanol will change if it gives up its OH
why does the acid not the alcohol give out the hydrogen
Have you done the video of additional polymers?
We have! It should come up if you search ‘addition polymers cognito’
Ok thanks
I didn't two water molecules removal step
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Hey, thanks for the great explanation. Though I don't understand why those 2 prerequisites you mentioned are required for a polycondensation reaction, and I can't even find any info on that elsewhere.
is this for aqa triple ?
It's for any gcse exam board
PLEASE HELP - how do you know/work out what the product is?
the product is a polyester
and water
@@maximusekon146
Nice video but why is another water molecule lost when drawing the repeating unit? Is one water molecule lost when the two monomers combine, then another when another ester joins?
Hi, so tor from the repeating unit, one H2O is lost from the ester bond in the middle, but then another H2O is effectively lost from the 2 ends, in preparation for the formation of new ester bonds at either end. It's a bit weird because it's not really an equation for a single reaction, but a summary of all the condensation reactions. Hope that helps :)
@@Cognitoedu Oh that makes sense now, as the H from the diol and the OH from the carboxyl make up a second water molecule. Thank you!
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i just realized the diol one is (OH-) not (OH-C-C-) as stated in the video
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Big up I still don’t understand
You sen
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Im cooked
Polyester are biodegradable? Some studies show that they are not. (Could you clear that for me)
Some are biodegradable these are known as biopolyesters
I’m in class😂😂
imma fail
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Thank you