ADDITION POLYMERIZATION
- The individuals unit that polymerizes to form a polymers is known as a monomers. Eg Ethene
- The structure formed by the polymerization of the monomer is a polymers.
Polymers are materials made by linking up smaller repeating chemical units.
Some bend and stretch – rubber and polyester.
Some hard and tough – epoxies and glass.
ADDITION POLYMERS
- a) Formed by addition reaction.
- b) Require only one monomer generally an alkene
- c) Nothing is lost in the reaction.
eg Polyethene, polypropene
CONDENSATION POLYMERS
- a) Requires two monomers
- b) Requires two functional group
- c) Formed by condensation reaction.
- d) A small molecule of water is
- e) Example: Nylon a polyester
Synthetic Polymer
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NATURAL POLYMERS
- a) They are found naturally
- b) All the complex biomolecules are polymers
| Monomer | Polymer |
| Glucose | Starch |
| Proteins | Amino Acid |
| Nucleotide | DNA |
DNA
- a) DNA is polynucleotide
- b) Nucleotide = Phosphate + Sugar + Nitrogenous Bases
- c) There are four bases present in the DNA
- Adenine
- Thymine
- Guanine
- Cytosine
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References:
BBC Bitesize
Wikipedia
Wikimedia Commons