Polyesters, the group of plastics that PET (also called polyethylene terephthalate) belongs to, do occur in nature. "They protect plant leaves," explained the University of Portsmouth researcher.

In the history of biodegradable plastics, polyesters played a dominant part just from the beginning of the development. One of the first products developed as biodegradable plastics from the beginning ...

Polyesters occur naturally as biological polymers, but can also be made artificially. Man-made polymers are often used in clothing. Polyesters are an example of a condensation polymer. A simple ...

E. A. Dawes, “Microbial Energetics,” Chapman and Hall, New York, N.Y., 1986.