Vinyl Ester Resin Vs Epoxy

Polyester resins published on june 5 2018 june 5 2018 13 likes 0 comments.

Vinyl ester resin vs epoxy.

Has some great papers on this which i am quoting from. Specifically proper cure of vinyl ester resins and a 15 year study of the effective use of permeation barriers in marine composites to prevent corrosion and blistering. Vinylester is essentially a styrene modified epoxy resin. The vinylester resins are only about 1 3rd as strong as the epoxy.

Epoxy resin is known in the marine industry for its incredible toughness and bonding strength. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. The hardener catalyst for vinyl ester resin and polyester resins is mekp. Epoxy adheres to wood much better than polyester does.

In addition they do not adhere well to either the carbon fiber or kevlar materials. Like polyester resins they require mekp as a catalyst to cure or harden. For vinylester resins and even less for polyesters. To cover wood a laminate using epoxy resin and 10 oz cloth will yield a much better job than 10 oz.

Vinylester is most often used with fiberglass but is also applied to carbon fiber as an outer cosmetic coating. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Choosing the appropriate resin epoxy vs. Polyesters and vinylesters belong to another family of resins containing an unsaturated polyester or hybridized vinylester backbone which is catalyzed with.

Using epoxy you can improve the laminate properties with a post cure almost always. Epoxies belong to a family of resins which are epoxy functional which means they can be cured with amine curing agents at room temperatures to form excellent adhesives and composite resins. It adds excellent strength rigidity adhesion water and chemical resistance. Regarding costs vinyl ester resin is more expensive than polyester resin but cheaper than epoxy resin.

Quality epoxy resins stick to other materials with 2 000 p s i. Vinyl esters also use peroxides e g. This is oversimplified but it does help convey the qualities of the resin. Cloth and polyester resin.