Poly(ethylene glycol) is a polymer with the chemical formula HO(CH2CH2O)nH. Its properties vary according to its molecular weight, from a colourless and odourless viscous liquid to a waxy solid. It is a liquid at room temperature with a molecular weight of 200 to 600, and gradually becomes a semi-solid with a molecular weight above 600, with different properties depending on the average molecular weight. From colourless and odourless viscous liquids to waxy solids. As the molecular weight increases, its hygroscopic capacity decreases accordingly. The product is soluble in water, ethanol and many other organic solvents. It has a low vapour pressure and is stable to heat, acids and bases. It does not interact with many chemicals. It has good hygroscopicity, lubricity and bonding properties. Non-toxic and non-irritating.
This product is white granular. Soluble in water, soluble in some organic solvents. Its solution has high viscosity at low concentration, and can be processed by calendering, extrusion, casting, etc. It is a thermoplastic resin with good compatibility with other resins. It is resistant to bacterial erosion and has weak hygroscopicity in the atmosphere.
|Indicators/varieties||Appearance||Melting point/℃||pH||Average molecular weight||Viscosity/mPas||Hydroxyl value|
|PEG-200||Colourless and clear||-50±2||6.0-8.0||190-210||22-23||534-590|
|PEG-400||Colourless and clear||5±2||6.0-8.0||380-420||37-45||268-294|
|PEG-600||Colourless and clear||20±2||6.0-8.0||570-630||1.9-2.1||178-196|
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