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12 questions from this quiz
Flexible when heated, rigid when cooled
Polythene (plastic bags)
Addition polymerisation
Breaks double bonds between carbon atoms
Amorphous structure
Covalent bonding
Weak secondary bonds between chains
Van Der Wall's Forces break with heat
Improve properties like hardness/flexibility
Creates firmer, more rigid material
More tensile strength in aligned direction
Cannot be reheated or remoulded
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