Structure Vinyl Alcohol

Incomplete removal of the acetate groups yields resins less soluble in water and more soluble in certain organic liquids.

Structure vinyl alcohol.

Structure of polyvinyl alcohol source. Journal of molecular structure 43 1978 267 271 elsevier scientific publishing company amsterdam printed in the netherlands the structure of vinyl alcohol willem j. It is commonly supplied as beads or as solutions in water. While other vinyl polymers are prepared by polymerization of its corresponding monomer pva undergoes either partial or complete hydrolysis of polyvinyl acetate to remove acetate groups.

Bouma and leo radom research school of chemistry australian national university canberra a c t. The chemical structure of the resulting vinyl alcohol repeating units is. Smith dewitt coffey leo radom. It is colourless white and odorless.

When the reaction is allowed to proceed to completion the product is highly soluble in water and insoluble in practically all organic solvents. The structure of evoh is shown in fig. These materials are highly crystalline and are produced with various levels of ethylene content. Vinyl alcohol can be formed by the pyrolytic elimination.

With the formula c h 2 choh it is a labile compound that converts to acetaldehyde. Theoretical and experimental structures of vinyl fluoride and vinyl alcohol. Vinyl alcohol also called ethenol iupac name is the simplest enol. 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.

Theoretical and experimental structures of vinyl chloride and vinyl bromide. Structure of poly vinyl alcohol cryo hydrogels as studied by proton low field nmr spectroscopy. The journal of chemical physics 1993 98 5 3952. 10 4 and has a cas number of 26221 27 2.

It is not a precursor to polyvinyl alcohol synthesis. Kimble and jeremy p. In revised form 19 september 1977 abstract theoretical structures for vinyl. Macromolecules 2009 42 1 263 272.

Ethylene vinyl alcohol evoh is a copolymer of ethylene and vinyl alcohol. Component of watersoluble edible film that may be used to form pouches containing pre portioned aliquots of 1 certain dry ingredients i e instant tea instant coffee hot chocolate mix flavored drink powder and whey protein supplement powder to be used by the consumer in preparing ready to serve foods and beverages at a.