H H

where in the structural formula (11.5) the index n = 8. The groups R and R' are added to the ends to satisfy the chemical bonds of the terminal carbons. This particular compound, (11.6), is called polystyrene, and it is referred to as a linear polymer, although in reality it is staggered since the chemical bonds C—C—C in the carbon chain subtend the tetrahedral angle 0 = 109°28' between them.

The more complex monomer

forms the polymer

0 0

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