Thermoplastic Vinyl Alcohol

Grades include both fully hydrolyzed and partially hydrolyzed products.

Thermoplastic vinyl alcohol.

We report a new kind of thermoplastic elastomer using poly vinyl alcohol pvoh and a high melting ionic liquid il 1 ethylpyridinium bromide. Examples of potential food packaging uses are ketchup bottles presently pp evoh pp and enhanced shelf. Ftir spectra of a thermoplastic starch ethylene vinyl alcohol blend sample te and b thermoplastic starch ethylene vinyl alcohol blend containing 2 wt vitamin e sample tev. Poly vinyl alcohol pvoh pva or pval is a water soluble synthetic polymer it has the idealized formula ch 2 ch oh n it is used in papermaking textile warp sizing as a thickener and emulsion stabilizer in pvac adhesive formulations and a variety of coatings.

Korea packaging center korea institute of industrial technology bucheon south korea. Thermogravimetric tg analysis and differential scanning calorimetry dsc measurements were also conducted to examine the role of vitamin e in preventing thermal degradation of tps during the production process. It is colourless white and odorless. Search for more papers by this author.

The resistance of pvoh to non polar organic solvents will also protect foodstuffs from secondary contamination by printing inks etc. The polymer is not considered thermoplastic as the degradation temperature is below the melting point. It is commonly supplied as beads or as solutions in water. Thermoplastic poly vinyl alcohol pva water soluble materials basic properties.

Because of the instability of vinyl alcohol the thermoplastic polyvinyl alcohol pva or pvoh. Pvoh materials can now act as a more effective replacement for the ethylene vinyl alcohol polymers currently used as oxygen barrier layers for food packaging. With the formula c h 2 choh it is a labile compound that converts to acetaldehyde. Vinyl alcohol also called ethenol iupac name is the simplest enol.