Polymerisation :Synthetic polymers 4.4-4.6
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4.44 How are addition polymers formed?
Addition polymers are formed by joining up many small molecules called monomers.
4.45 How do you draw the repeat unit of an addition polymer?
• Draw the display formula of the polymer. • Join the carbons together with no double bond. • Add brackets around the formula. • Put an “n” outside the brakets. • continue a line between the carbons, through the brackets - this shows the chain continues.
4.46 How can you deduce the structure of a monomer from the repeat unit?
• Look at the repeat unit (it will have a carbon chain with a bracket and n on either side) • Find the two carbon atoms in the backbone • Replace the single bond between them with a double bond C=C 4.Remove the brackets and the n.