polymerisation: this is the name of the process to describe how synthetic plastics are made.
Thermosetting plastics:
- polymer chains are cross linking chains
- this is called covalent bonding.
- this stops them from being re-shaped.
- makes the polymer a very rigid structure.
Thermoplastics:
- linked molecoles in long chains.
- held together by mutual attraction called 'van der waals' forces.
- this means when it is heated the bonds between the chains are weekened and become pliable.
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