Chemical Limericks for Advent 3: Charles goodyear, RUBBER!

When rubber started to be used
In tires and tubing and shoes
In the cold it would shatter, in the heat it would splatter
And abrase when hardly abused
Charles Goodyear by chance would discover
A way to strengthen his rubber
When into his pot, some sulphur was knocked
What came out was much tougher rubber
The trick to the stabilisation
Was due to cross link formation
The sulfur restrains the polymer chains
In a process called vulcanisation
by Nicholas Dawson

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