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- 1what are polymers?Polymers are very large molecules made when many smaller molecules join together, end to end. The smaller molecules are called monomers.
lots of monomer molecules → a polymer molecule.
The polymers formed are called addition polymers. - 2how are they madeThe double bonds separate to join another Ethene (or another thing)
- 3what do you need to do when drawing repeating joinsChange the double bond in the monomer to a single bond in the repeat unit
Add a bond to each end of the repeat unit
- 4what are 5 uses of polymersPolymer Typical use
Poly(ethene) - Plastic bags and bottles
Poly(propene) - Crates and ropes
Poly(chloroethene) - Water pipes and insulation on electricity cables
new packaging materials
waterproof coatings for fabrics (eg for outdoor clothing)
fillings for teeth
dressings for cuts
hydrogels (eg for soft contact lenses and disposable nappy liners)
smart materials (eg shape memory polymers for shrink-wrap packaging)
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- FlashCards sobre Sem título, criado por fdanewmark em 22-02-2015.
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