A-LEVEL AQA ChEMISTRY NOTES
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- Condensation polymerisation involves the reaction of two different types of monomers, with different functional groups.
- Reacting dicarboxylic acids with diols forms polyesters
- Adjacent polyester chains are held together by permanent dipole-dipole attractions due to the presence of the polar carbonyl group
- The polyester terylene (PET) is formed from the monomers terephthalic acid and ethylene glycol. Typically used in plastic bottles, sails, sheets and clothing
- Reacting dicarboxylic acids and diamines forms polyamides
- Adjacent polyamide strands are held together by hydrogen bonds
- Nylon is a polyamide used in textiles
- Kevlar is a polyamide used in bullet and stab-proof vests
- Polypeptides are also condensation polymers made up of amino acids
Disposal of Polymers
- Polyalkenes are chemically inert and non-biodegradable due to the non-polar saturated C-C bonds.
- Condensation polymers can undergo hydrolysis due to the polar C=O bonds which make them susceptible to attacks by nucleophiles. This makes them biodegradable.
- Advantages and disadvantages of different methods of disposal
Advantages of Recycling
Disadvantages of Recycling