3.12 Polymers Flashcards
What is condensation
Small molecule eliminated (usually H2O) to form a larger molecule
How many monomers are condensation polymers usually formed from
2
What properties do these monomers forming condensation polymers have
Each has 2 functional groups
Examples of condensation polymers
Polyesters
Polyamides
Polypeptides
What is the linkage in a polyester
The ester linkage
What are the 2 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
Draw a generic repeating unit for a polyester
Which monomers is Terylene made from
Benzene-1,4-dicarboxylic acid
Ethane-1,2-diol
Draw the repeating unit of Terylene
What is Terylene used for
As a fibre for making clothes
What is the linkage in a polyamide
Peptide linkage
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What are the 2 monomers used to form a polyamide (generic names and structures)
Diamine and dicarboxylic acid
Examples of polyamides
Nylon, kevlar
What is Kevlar used for
In body armour eg bullet proof vests
Which monomers is kevlar made from
1,4-diaminobenzene
Benzene-1,4-dicarboxylic acid
What is the repeating unit of kevlar
Why is kevlar so strong
Rigid chains and close packing of flat aromatic rings
Draw the repeating unit of a polypetide
Why are poly(alkenes) not biodegradable
Non-polar CH bonds and CC bonds
Why is it bard to burn poly(alkenes)
Releases CO2, CO, C and other toxic chemicals from monomers
Why cant condensation polymers be broken down
They have polar bonds
How are condensation polymers broken down
Hydrolysis
What does draw the polymer mean
Draw with square brackets, n, and trailing bonds
What does draw the repeating unit mean
Just draw the molecule, with trailing bonds - no brackets or n
