Condensation Polymers

Discover how to make one of the strongest polymers and more with this video. Find out about how polyesters and polyamides are made as well as a few examples to help you secure as many polymer marks as possible.

[@jamesasher63]

Thank you for making chemistry so much clearer, I can't thank you enough :)

[@ismaeelahmed4873]

Do we need to memorise all these specific example for AQA?

[@alevelsdemystified3410]

Nice video

[@ambersmalley4242]

Hello! I find your videos very useful! I noticed you mentioned amides in your video and I was wondering, do you had a video on those? It's in my Edexcel specification. Thank you very much again :)

[@AlleryChemistry]

Not as such as amides pop up in various topics. Thanks for watching the vids though! Please share them.

[@fatimakhan409]

How do we tell by just looking at the polymer which sort of reaction occurred for it to be formed; addition or condensation?

[@AlleryChemistry]

+fatima khan If the polymer contains C=ONH link then it would be formed by condensation between amine and carboxylic acid. Similarly if you see COO-R (ester group) then this is also condensation. If it is just an alkane then this would have been formed from an alkene monomer so will have been addition. Hope this helps!

[@eveharding5306]

Can you make a polyamide with amino acids ?

[@m1ssy_xx]

Do you have any videos on hydrolysing polyesters and polyamines?

[@CRYPTO-AIR-DROP10]

thanks alot

[@m1ssy_xx]

My book says (2N-1) H2O for terylene. How did they come about this?

[@5aadiq747]

it cant be

[@noorfarouq4636]

If there are two molecules of water needed to carry out the hydrolysis, you would have 2H2O. n represents the number of repeat units you have in the polymer so depending on how many there were, that number multiplied by 2 equals the number of water molecules needed, hence 2nH2O. When you stop the polymer chain and no more of it is extended, the chain stops at the fixed bonds and no more water is produced. You would have one less water molecule produced than you would have if the polymer was longer, seen as it has stopped there, you need 1 less water molecule to hydrolyse it, hence (2n-1)H2O. Hope this makes sense.

[@Maks0889]

isn't the water amount (2n-1)? one water eliminated for each (n) of diol and (n) dicarboxylic acid and then one additional water per each additional member of polymer? it's in ocr chemistry a2 book by dave gent and rob ritchie, cheers

[@AlleryChemistry]

maxAmain Yes however in the video I have shown a section of the polymer chain where 2 water molecules have been lost. One where the ester link is and one from the 2 ends of the repeat unit. The example that the OCR book will show is just the joining of 2 molecules to show the ester link. In this case it will be 2n-1 and hence only give 1 water molecule. Be cautious with the question that they may ask this in the exam to make sure the right amount of water is given. From what you have told me it seems OCR may be more inclined to ask about 2 monomer units joining only hence the 2n-1. Hope this helps!

[@Vedrajrm]

thank you very much

[@AlleryChemistry]

Cheers! Please share this channel with your friends. The more people that use it the better! 😀

[@gabygabriel2755]

And how do "we" join them?What are the conditions?

[@e_z7622]

High pressure and high temperatures