Polyester - Wikipedia
Polyester is a category of polymers that contain one or two ester linkages in every repeat unit of their main chain. [1] As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in plants and insects, as well as synthetics such as polybutyrate.
Polyesters - Chemistry LibreTexts
2023年1月23日 · This page looks at the formation, structure and uses of a common polyester sometimes known as Terylene if it is used as a fibre, or PET if it used in, for example, plastic drinks bottles. A polyester is a polymer (a chain of repeating units) where the individual units are held together by ester linkages.
polyesters - terylene and PET - chemguide
A polyester is made by a reaction involving an acid with two -COOH groups, and an alcohol with two -OH groups. In the common polyester drawn above: The acid is benzene-1,4-dicarboxylic acid (old name: terephthalic acid). The alcohol is ethane-1,2-diol (old name: ethylene glycol).
Polyesters - Essential Chemical Industry
The different uses of polyesters depend on their structure. The benzene rings in the molecular chain give them a rigid structure, leading to high melting points (over 500 K) and great strength. They do not discolour in light.
Polyester | Synthetic Fibers, Textiles, Clothing | Britannica
2024年11月6日 · Polyester, a class of synthetic polymers built up from multiple chemical repeating units linked together by ester (CO-O) groups. Polyesters display a wide array of properties and practical applications. Permanent-press fabrics, disposable soft-drink bottles, compact discs, rubber tires, and enamel
The structure of polyester fibers - ScienceDirect
2009年1月1日 · Polymer morphology, amorphous and semi-crystalline polymers and the concept of Tg are discussed and how chemical structure governs fiber properties. Processes like melt-spinning and drawing, and texturizing are summarized.
Polyester - an overview | ScienceDirect Topics
2012年4月2日 · As a general requisite, for a reaction to be useful for preparing polyesters, it must lead to chains of high molecular weight, regular chemical structure and, possibly, with well-defined types of terminal groups.
Polyester - SpringerLink
2023年1月10日 · The molecular structure of polyester fibers is essentially dependent on the spinning speed. At low take-up speeds (< 3200 m/min), polyester fibers have a predominantly amorphous structure. With increasing spinning speed, the macromolecules crystallize and a higher orientation of the macromolecules along the fiber axis results.
Polyester (PES)
2022年8月8日 · Polyester (PES) is an important type of synthetic fiber. It is made from purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG) by esterification or ester exchange and condensation reaction. The molecular structure is …
Polyester | 113669-95-7 - ChemicalBook
2024年12月18日 · Molecular Formula: C4H10O2· Molecular Weight: 0 MDL Number: MFCD00165468 MOL File: Mol file
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