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Difference between Ethylene Glycol and Polyethylene Glycol

Time:2023-10-27

Difference between Ethylene Glycol and Polyethylene Glycol

Ethylene glycol and polyethylene glycol are two different compounds. The main differences between them are as follows:

Chemical structure: The chemical formula of ethylene glycol is C2H6O2. It is a diol composed of two hydroxyl groups and one carbon atom. Polyethylene glycol is a polyhydroxy polymer composed of many ethylene glycol molecules connected through ether bonds. Its chemical structure can be expressed as HO(CH2CH2O)nH.
Physical properties: Since polyethylene glycol is a high molecular polymer, its physical properties are different from ethylene glycol. For example, the melting and boiling points of polyethylene glycol increase with increasing molecular weight, while ethylene glycol has fixed melting and boiling points.
Usage: Ethylene glycol is mainly used in the manufacture of polyester polyester, polyester resin, hygroscopic agents, plasticizers, surfactants, synthetic fibers, cosmetics and explosives, etc., and is also used as a solvent for dyes, inks, etc., and to prepare anti-freeze for engines. agent, gas dehydrating agent, manufacturing resin, etc. Polyethylene glycol is widely used in cosmetics, pharmaceuticals, chemical fiber, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing and food processing industries, such as lubricants, moisturizers, and dispersants. wait.
In general, there are obvious differences between ethylene glycol and polyethylene glycol in terms of chemical structure, physical properties and uses.

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