PEG

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Polyethylene glycol (PEG)

Polyethylene glycol (PEG) is a potential water-soluble support mechanism that can be used for 3D printing.

For detailed information see this page.

Properties

PEG is a flexible, non-toxic water-soluble wax-like polymer.


Via a random MSDS, here: "Melting Point: Melting point increases as molecular weight increases: PEG 400 = 4-8C (39-46F) PEG 600 = 20-25C (68-77F) PEG1500 = 44-48C (111-118F) PEG 4000 = 54-58C (129-136F) PEG 6000 = 56-63C (133-145F)"

Uses

PEGs are used in cosmetics, medicine, used in food and food packaging. They can be used as plasticizers, solvents, water-soluble lubricants for rubber molds; wetting or softening agents, antistatics in the production of urethane rubber, components of detergents, etc.

Cost

Jesse Brennan pointed out that Lee Valley sells PEG 1000 and PEG 1450 for CAD$6/lb (USD$11.25/kg). PEG 1000 melts at 37C, PEG 1450 melts at 43C. (PEG x means PEG with a molecular weight of x). Lee Valley is an expensive but high-quality Canadian woodworking tool store. They sell the PEG as a "green wood stabilizer".