Vinyl Ester Molecular Structure

Vinyl esters shrink less on curing which means that pre release of a laminate from a mold is less significant.

Vinyl ester molecular structure.

Vinyl ester or vinylester is a resin produced by the esterification of epoxy resin with unsaturated monocarboxylic acid. Vam is usually produced by the catalysed vapour phase reaction of acetic acid with ethylene and oxygen in a fixed bed tubular reactor using a supported noble metal catalyst. An ester of vinyl alcohol. This makes it much more resistant to water penetration hydrolysis which can cause osmotic blistering.

Vinyl acetate is a commercially important monomer that is classified as a vinyl ester i e. Vinyl esters are more tolerant of stretching than polyesters. Vinyl alcohol containing polymers are prepared by hydrolysis of the corresponding vinyl acetate polymers. Ethylene is now the preferred feedstock for vam vinyl acetate monomer largely replacing the earlier acetylene based process.

Vinyl acetate is not as hydrolytically stable in polymers as are the structurally similar acrylic esters. Carbonic acid eicosyl vinyl ester c23h44o3 cid 91693137 structure chemical names physical and chemical properties classification patents literature. Vinyl ester refers to esters formerly derived from vinyl alcohol. 2 acetoxy benzoic acid vinyl ester.

The most widely used member of the category is vinyl acetate. Commercially important examples of these monomers are vinyl acetate vinyl propionate and vinyl laurate. 2 acetoxybenzoic acid vinyl ester. Vinyl ester has fewer open sites in its molecular chain.

Vinyl ester monomer contains two vinyl end groups that allow cross linked structure to form during the reaction. As the length of the chain is available to absorb impact loads this makes vinyl ester resins more durable and resilient than polyesters. Vinyl ester is dissolved in a monomer or reactive diluent usually styrene the result is a low viscosity liquid having a solids content of 36 39. Vinyl esters have enhanced mechanical properties compared to polyesters with physical strength better impact and thermal shock resistance.