Discussion Polyethylene oxide being a polyether and containing an oxygen as

Discussion polyethylene oxide being a polyether and

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Discussion: Polyethylene oxide, being a polyether, and containing an oxygen as every third atom in the chain, readily hydrogen bonds with water. This large number of oxygen and their two pairs of nonbonded "p" electrons explains its high water solubility for its molecular mass (~4,000,000). HO-CH 2 -CH 2 -(-O-CH 2 -CH 2 -) n -OH The long strands of gel are formed when these large molecules intertwine much like spaghetti and are cross-linked by water molecules attached to the oxygen on adjacent molecules. The result is a "viscoelastic" gel. That is like molasses the gel has a high viscosity due to the large number of hydrogen bonds between the polymer molecules and water. The gel is elastic since these very long molecules can both straighten when stretched and slide past each other, forming fresh hydrogen bonds as they move. References: 1. , Demonstration 6.10 "Fluorescence" 2. Union Carbide product literature 3. Myerly, Richard C., J. Chem. Ed., 57, pp 437-8 (June 1980).
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