Most polyester fabric is not biodegradable. Polyester, or polyethylene terephthalate, is made from a chemical reaction involving crude oil, air and water. ... It's not considered biodegradable because most polyester takes from 20 to 40 years to break down, depending on the environment it's in.

Can polyester be biodegradable?

The majority of polyesters are not biodegradable, meaning that the polyester fabric shirt you bought last season will not decompose for 20 years at best and 200 years at worst. What's more, polyester is partially derived from petroleum, and the oil manufacturing industry is the world's largest pollutant.

Why are polymers not degradable?

Polymers, specifically biodegradable polymers, have extremely strong carbon backbones that are difficult to break, such that degradation often starts from the end-groups.