The C=C double bond in ethene is involved in the polymerisation reaction. It allows ethene molecules to join, so it is an example of an addition reaction>. Poly(ethene) is an addition polymer.

Addition polymers are made from molecules containing C=C bonds. Polymers have different properties and uses but it is difficult to dispose of them. DNA, starch and proteins are biological polymers.

In addition, utilizing the unique structures of the C1 polymers, success was made in preparing C1 polymers with enhanced acidity and much higher melting points, up to 130°C, compared to their ...