Polyethylene glycol
Description
A water-soluble polymer available in a range of viscosities from a honey-like solution to a hard wax-like block. Polyethylene glycols are used commercially as solvents for dyes, natural resins, and proteins. They are also used as plasticizers for Casein, Gelatin, Glue, Zein, Cork, and inks. Carbowax® formulations have also been used to slowly replaced water in water-logged wood providing structural support while decreasing wetness. They, however, remain somewhat tacky and can retain dirt that darkens and discolors the artifact.
Synonyms and Related Terms
PEG; poly(oxyethylene); polyglycol; polyether glycol; Carbowax® [Union Carbide]; PEG [Shell Chemical]; Polyethylenglykol (Deut.); macrogol (Fr.); polyetylenglykol (Sven.); polietilenglicol (Esp.)
Risks
- Combustible.
- Non-toxic (used in many foods).
- Cisco Chem: SDS
Physical and Chemical Properties
- Average molecular weights range from 200-6000
- Soluble or miscible with water and most organic solvents.
- Heat stable, inert, low vapor pressure.
| Composition | HOCH2(CH2OCH2)nCH2OH |
|---|---|
| CAS | 25322-68-3 |
Comparisons
General Characteristics of Polymers
Physical Properties for Selected Thermoplastic Resins
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
- Wikipedia: dyeshttp://en.wikipedia.org/wiki/Polyethylene_glycol (Accessed Feb. 10, 2006)
- Gordon Hanlon, contributed information, 1998