Vinyl Ester Molecular Structure

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 molecular structure.

2 acetoxy benzoic acid vinyl ester. Vinyl esters are more tolerant of stretching 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 acetate is a commercially important monomer that is classified as a vinyl ester i e.

Vinyl ester refers to esters formerly derived from vinyl alcohol. The most widely used member of the category is vinyl acetate. Vinyl esters undergo homopolymerization via a radical mechanism. Ethylene is now the preferred feedstock for vam vinyl acetate monomer largely replacing the earlier acetylene based process.

Chemical structure of the vinyl ester resin monomer. The molecular structure of vinyl ester resins is similar to that of polyesters but differs primarily on the location of their reactive groups which are positioned only at the ends of the chains. Vinyl acetate is not as hydrolytically stable in polymers as are the structurally similar acrylic esters. Vinyl ester monomer contains two vinyl end groups that allow cross linked structure to form during the reaction.

Carbonic acid eicosyl vinyl ester c23h44o3 cid 91693137 structure chemical names physical and chemical properties classification patents literature. Vinyl ester has fewer open sites in its molecular chain. Commercially important examples of these monomers are vinyl acetate vinyl propionate and vinyl laurate. An ester of vinyl alcohol.

Vinyl alcohol containing polymers are prepared by hydrolysis of the corresponding vinyl acetate polymers. This makes it much more resistant to water penetration hydrolysis which can cause osmotic blistering. 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. Vinyl esters shrink less on curing which means that pre release of a laminate from a mold is less significant.