Flashcards
6.2.3 Polyesters and Polyamides
Cards in this deck (27)
- 1What is condensation?Small molecule eliminated (usually H2O) to form a larger molecule
- 2How many monomers are condensation polymers usually formed from?two
- 3What properties do these monomers forming condensation polymers have?Each has two functional groups
- 4Examples of condensation polymers?Polyesters
Polyamides
Polypeptides - 5What is the linkage in a polyester?ester linkage
- 6What molecule is eliminated in formation of a polyester?H2O
- 7What are the two monomers which form a polyester (generic names and structures)?Diol and dicarboxylic acid or a molecule with both alcohol and a carboxylic acid functional groups
- 8Draw a generic repeating unit for a polyester.-O-A-O-C=O
I
B
I
C=O
I - 9Which monomers is Terylene made from?
- 10What is Terylene used for?As a fibre for making clothes
- 11What is the linkage in a polyamide?
- 12Which molecule is eliminated when a polyamide is formed?H2O
- 13What are the two monomers used to form a polyamide (generic names and structures)?Diamine and dicarboxylic acid
- 14Examples of polyamides?Nylon, Kevlar
- 15Which monomers is Nylon-6,6 made from?
- 16If you are making Nylon in the lab, what monomers would you use and why? What molecule is eliminated?Use hexane-1,6-diacyl chloride as the rate of reaction is much faster. HCl is eliminated
- 17What is Kevlar used for?In body armour (bullet proof vests, stab vests), helmets (e.g. F1 drivers’), oven gloves
- 18Which monomers make up Kevlar?
- 19What is the repeating unit of Kevlar?
- 20Why are poly(alkenes) not biodegradable?Non-polar C-H and C-C bonds
- 21Why is it bad to burn poly(alkenes)?Releases CO2, CO, C (soot) and other toxic chemicals from monomers
- 22Where do most poly(alkenes) end up?Landfill sites
- 23Why can condensation polymers be broken down?They have polar bonds
- 24How are condensation polymers broken down?Hydrolysis (opposite of condensation)
- 25What is the difference between addition and condensation polymerisation?Condensation makes the polymer and eliminates a small molecule; addition polymerisation breaks C=C to form only one product (just the polymer).
- 26Explain hydrogen bonding between polyamides.Both C=O and N-H are polar bonds, as N’s electronegativity > H’s and O’s electronegativity > C’s.
Hydrogen bonding between H+ and O- in different molecules
Uses the lone pair of electrons on the O atom - 27Why do polyesters not show hydrogen bonding?All O-H bonds are removed during polymerisation
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- A level Chemistry (Module 6 – Organic Chemistry & Analysis) Flashcards on 6.2.3 Polyesters and Polyamides, created by Aania Bokhari on 06/03/2019.
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- Aania Bokhari
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