Polyester
Polyester is a category of polymers that primarily contains the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics through step-growth polymerization such as polycarbonate and polybutyrate.
Chemical structure[edit]
The ester functional group is the characteristic chemical structure of a polyester type, which is characterized by the R-O-R' formula. The R and R' are the two organic substituents of the carboxylic acid. The esters are formed by condensation reaction from a carboxylic acid and an alcohol.
Types of polyesters[edit]
Polyesters can be classified into two types: saturated and unsaturated. Saturated polyesters refer to those that are not reactive, while unsaturated polyesters are those that are reactive due to the presence of carbon-carbon double bonds.
Applications[edit]
Polyesters are used in the manufacture of all kinds of products, from clothing and home furnishings to industrial products and packaging. They are also used in the production of plastic bottles, films, tarpaulin, canoes, liquid crystal displays, holograms, filters, dielectric film for capacitors, film insulation for wire and insulating tapes.
Environmental impact[edit]
Polyesters are not biodegradable and can persist in the environment for many years. Their production and disposal contribute to environmental pollution. However, some polyesters are recyclable and can be reused to make new products.
See also[edit]
.jpg)
Ad. Transform your health with W8MD Weight Loss, Sleep & MedSpa
Tired of being overweight?
Special offer:
Budget GLP-1 weight loss medications
- Semaglutide starting from $29.99/week and up with insurance for visit of $59.99 and up per week self pay.
- Tirzepatide starting from $45.00/week and up (dose dependent) or $69.99/week and up self pay
✔ Same-week appointments, evenings & weekends
Learn more:
- GLP-1 weight loss clinic NYC
- W8MD's NYC medical weight loss
- W8MD Philadelphia GLP-1 shots
- Philadelphia GLP-1 injections
- Affordable GLP-1 shots NYC
|
WikiMD Medical Encyclopedia |
Medical Disclaimer: WikiMD is for informational purposes only and is not a substitute for professional medical advice. Content may be inaccurate or outdated and should not be used for diagnosis or treatment. Always consult your healthcare provider for medical decisions. Verify information with trusted sources such as CDC.gov and NIH.gov. By using this site, you agree that WikiMD is not liable for any outcomes related to its content. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
