Polyester || Some important Polymers || UG PaathShaala #polyester
Channel: PaathShaaala
Date: 2021-05-02

Polyester is a category of polymers that contain the ester functional group in every repeat unit of their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, in plants and insects, as well as synthetics such as polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are non-biodegradable. Synthetic polyesters are used extensively in clothing.
Polyester fibers are sometimes spun together with natural fibers to produce a cloth with blended properties. Cotton-polyester blends can be strong, wrinkle- and tear-resistant, and reduce shrinking. Synthetic fibers using polyester have high water, wind and environmental resistance compared to plant-derived fibers. They are less fire-resistant and can melt when ignited.
Liquid crystalline polyesters are among the first industrially used liquid crystal polymers. They are used for their mechanical properties and heat resistance. These traits are also important in their application as an abradable seal in jet engines.
Natural polyesters could have played a significant role in the origins of life. Long heterogeneous polyester chains and membrane structures are known to easily form in a one-pot reaction without catalyst under simple prebiotic conditions.

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