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PEO called PEO, the regular linear spiral structure, the structure - (-CH2-CH2) kn-, n> 300, the mean molecular weight> 104, a white powder, no special smell. A relative density. 2l, the apparent density of 0.2 to 0.5, temperature 63 ~ 67 ° C, -50 ° C temperature brittle. Polyethylene oxide and the nature of the PEG cereus very different, from the sheer physical nature, we can see that the two are two polymers, the biggest feature is its solubility and thermal plasticity. Completely dissolve in water, aqueous solution Oo or alkaline. Some may also dissolve in organic solvents such as methylene chloride, dichloroethane, chloroform, methyl chloroform, tetrahydrofuran, methanol, methyl ethyl ketone, its solution at a very low concentration have high viscosity. The concentration of less than 10% of the water is very thick but resilient. The concentration greater than 20%, non-viscous solution of reversible elastic gel. When the water temperature close to the boiling point of water, PEO will precipitate out. PEO with a lot of material, such as phenolic resin, gelatin, asphalt, etc. halogen Generation Association Complex. Polyethylene oxide resin compatibility with other good. With good chemical stability, both acid and alkali - resistant, corrosion-resistant bacteria Buhuifubai. In the atmosphere of small hygroscopicity. Low toxicity to the skin without irritation.
used as water-soluble adhesive thickeners, to be dissolved in particular caution, because PEO very soluble in water, water in the powdered polyethylene oxide was moist, had time to be scattered on the bonding together , thus forming a "fish eye" After very difficult to dissolve. The solution is a simple one of the increase dissolved in boiling water. Second is polyethylene oxide and water-soluble miscibility a non-water solvent dispersing. Preparation can also direct water-soluble adhesive, 1% to 5% (wt) solution has a high viscosity. Store in a cool, dry coffers, moisture.
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