Glycols belong in the alcohol group of chemicals. Although both propylene glycol and ethylene glycol have a large number of applications across a variety of industries and uses including cosmetics and preservatives propylene glycol and within the manufacture of resins, inks and polyethylene terephthalate ethylene glycol both have a common use within antifreeze and coolant mixes. Antifreeze is typically a mixture of distilled water with a base product - ethylene or propylene glycol.
In some formulas a specialised inhibitor is also sometimes added to help protect system metals from corrosion. The role of antifreeze has a dual purpose - lowering the freezing point of liquid in a cooling system as well as also raising the boiling temperature of water. Through this, an antifreeze solution helps keep cooling systems free flowing and clear of icy build-up during cold weather conditions as well as preventing any issues with over-heating. The main difference between propylene glycol and ethylene is the level of toxicity.
Among PEGs many uses are its ability to function as a binding agent and dispersing agent across many industries. When manufacturing moulds in ceramics or casting, polyethylene glycol is used as a binding agent to ensure that the mould retains its shape and structure. As a dispersant, PEG improves the separation of particles in order to prevent clumping. In toothpaste, polyethylene glycol acts as both a binding and dispersing agent by keeping the xanthan gum evenly distributed and preventing the paste from forming any clumps in the tube.
Polyethylene glycol is used in many more applications that span a variety of different industries. PEG is also used in:. With that being said, polyethylene glycol does, like every chemical, have its drawbacks that should be kept in mind when using it directly.
The main issue surrounding PEGs toxicity is the fact that it contains ethylene glycol, a potential carcinogen and toxic substance. Depending on how it has been manufactured, PEG could also contain contaminants like lead, arsenic or 1,4-dioxane.
Therefore, it is also worth doing your research before handling pure polyethylene glycol. At ReAgent, our online chemical shop has polyethylene glycol available in a range of molecular weights.
We also offer flexible packaging options to ensure that we meet the needs of your business. Check out our online shop today, or get in touch to find out more about what we can offer you. The blog on chemicals. The blog, its authors and affiliates accept no responsibility for any accident, injury or damage caused in part or directly from following the information provided on this website. We do not recommend using any chemical without first consulting the Material Safety Data Sheet which can be obtained from the manufacturer and following the safety advice and precautions on the product label.
Polyethylene Glycol: Polyethylene glycol is produced from the reaction between ethylene oxide and water, ethylene glycol or ethylene glycol oligomers. Ethylene Glycol: The molecular weight of ethylene glycol is about Ethylene Glycol: Ethylene glycol is mainly used for the manufacturing of polyester fibers and as an automotive antifreeze. Polyethylene Glycol: Polyethylene glycol has many uses including medical uses, chemical uses, biological uses, industrial uses, etc.
Both Ethylene glycol and Polyethylene glycol are commercially very important and used in a number of applications. Ethylene glycol is a syrupy liquid at room temperature whereas polyethylene glycol is a solid material. Wade, Leroy G. PubChem Compound Database, U. National Library of Medicine, Available here. Her interest areas for writing and research include Biochemistry and Environmental Chemistry. View all posts. The reaction between ethylene glycol and its oligomers is preferable than with water.
The length of the polymer chain depends on the ratio of reactants. The polymerization mechanism can be cationic or anionic polymerization depending on the type of catalyst. Ethylene Glycol: Ethylene glycol is mainly used in antifreeze formulations and as a raw material in the manufacturing of polyesters such as polyethylene terephthalate PET in plastic industry.
Ethylene glycol can facilitate convective heat transfer in automobiles and liquid cooled computers. It is also used in chilled water air conditioning systems. Polythene Glycol: Polythene glycol possesses a low toxicity and therefore it is used as a lubricating coating for both aqueous and non-aqueous environments.
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