Structural unit

Structural unit

In polymer chemistry, a structural unit is a building block of a polymer chain, and related to the repeat unit. It is the result of a monomer which has been polymerized into a long chain. When different monomer are polymerized, a copolymer is formed. It is a routine way of developing new properties for new materials.

Examples

Consider this example: Take polyethylene terephthalate. The monomers which could be used to create this polymer are ethylene glycol and terephthalic acid:

HO-CH2-CH2-OHandHOOC-Ph-COOH

In the polymer, there are two structural units, which are-O-CH2-CH2-O-and-CO-Ph-CO-

The repeat unit is

-CH2-CH2-O-CO-Ph-CO-O-

External links

* [http://openlearn.open.ac.uk/mod/resource/view.php?id=196631 Polymer structure]


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