Vinyl Ester Polymer Composites

Various types of vinyl ester and vinyl based polymers such as poly vinyl chloride pvc low and high density polyethylene ldpe and hdpe polypropylene pp polyvinyl alcohol pva and polyvinyl acetate pvac are discussed.

Vinyl ester polymer composites.

The most common thermosetting resin used today is a polyester resin followed by vinyl ester and epoxy. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Natural fiber reinforced vinyl ester and vinyl polymer composites. While vinyl ester resins are classified as polyester based formulations they are actually an intermediate between a polyester backbone and epoxy terminations on the ends of the molecules.

These formulations provide low cost ease of handling quick cure and high strength to create a wide variety of composite parts in countless applications. 30 natural fiber reinforced vinyl ester and vinyl polymer composites macrofibril is framed by microfibril that consists of cellulose hemicelluloses and lignin ho et al 2012b. Vinyl ester has lower resin viscosity approx 200 cps than polyester approx 500cps and epoxy approx 900cps. Methyl ethyl ketone peroxide mekp is one such hardening agent.

Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Polymer technologies pte ltd. Polyester and vinyl ester resins are the most commonly used matrix resins to create composite parts. Vinyl polymer is a group of matrices comprising of thermosets and thermoplastics that are normally preferred as matrices with natural fibers.

Characterization properties and applications discusses recent advances on the development characterization and application of natural fiber vinyl ester and vinyl polymers composites. They are based on either bisphenol a or novolac chemistry with methacrylic acid forming the polymer. Epoxy vinyl ester resin derakane momentum. Various types of vinyl ester and vinyl based polymers such as poly vinyl chloride pvc low and high density polyethylene ldpe and hdpe polypropylene pp polyvinyl alcohol pva and polyvinyl acetate pvac are discussed.

The composite made of thermoset resin cannot be reprocessed or recycled. Films pressure sensitive tapes mold releases non liquid peel plies breathers bleeders sealant tapes. Vacuum bagging and composite tooling materials. Both groups have their own unique features in benefiting their applications.

Polyester resins also known as unsaturated polyester resins upr combined with fiberglass reinforcements have been the building blocks of the composites industry for decades.