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12 cards from this deck
Flexible when heated, rigid when cooled
Acrylic (Perspex), polythene, polypropylene
Addition polymerisation
Basic unit molecule used in polymerisation
Free radical (catalyst)
Amorphous (random, disorganised)
Covalent (very strong)
Van Der Wall's Forces (weak)
Van Der Wall's Forces break down
Mix chains to improve properties (harder/softer/rigid/flexible)
Creates firmer, more rigid material
More tensile strength along aligned chains
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