Chemistry - Polyethylene terephthalate
Soft drink bottles
The polyester formed is polyethylene terephthalate. This polyester has a
variety of trade names including Terylene and Dacron. It is blended with
cotton in clothing, and used in packaging film and recording tapes. It is
also used in the manufacture of soft drink bottles and may be referred as
PET, an acronym for polyethylene terephthalate.
Polyesters are also produced from monomers that contain more than two
reactive functional groups. Functional groups on different polyester chains
can react together to form _cross-links_ between the chains. Cross-links
can also form when adjacent polyester chains are unsaturated. The
cross-linking usually involves the _addition _of groups of atoms between
the double C=C bonds on adjacent polyester chains.
Many of the most common uses of polyesters involve fibreglass - _polyester
resins reinforced with glass fibres._ They have applications as diverse as
bus bodies, boat hulls, swimming pools and fuel and chemical storage tanks.
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