Density Of Vinyl Ester Resin

Density kg dm3 1 9 2 0.

Density of vinyl ester resin. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. High density cross linked products are suitable for temperatures above 250 o f 121 o c. The vinyl groups refer to these ester substituents which are prone to polymerize. The shrinkage of vinyl ester resins during cure was calculated according to density measurements to be 4 10 depending on styrene content.

Standard epoxy vinyl ester resins are limited to 220 250 o f 104 121 o c in most applications. They are typically stronger than polyesters and more resistant than epoxies as they are a hybrid form of polyester resin that has been strengthened by epoxy. To make them more workable they are typically dissolved in a vinyl monomer and occasionally a solvent 1 together with an appropriate organic peroxide. Vinyl ester resin or often just vinyl ester is a resin produced by the esterification of an epoxy resin with acrylic or methacrylic acids.

Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Vinyl ester resins combine the best features of polyester and epoxy resins into one solution. 2 the mixture is poured sprayed or molded into the final product and then converted into a thermoset by heating. For vinyl ester resins with longer lengths mn 1000 g mol crosslinked networks have higher.

Vinyl esters also use peroxides e g. Consequently they are generally cut in styrene monomer for management as a liquid resin. The diester product is then dissolved in a reactive solvent such as styrene to approximately 35 45 percent content by weight. Normal viscosity for vinyl esters is less than polyester about 500 centipoise when cut in styrene monomer.

Reactive diluent or monomer styrene commonly 0 60 typically 35 45 viscosity control lower cost improve wetting behavior. Vinyl ester resins are relative viscous low molecular weight prepolymers. It was found that the chain length of vinyl ester oligomers strongly affects the properties of the networks. Polymer resin filler catalyst accelerator etc and click calculate.

It has a measured glass transition temperature t g of 110 c hence allowing the clamp to withstand up to a maximum service temperature of 80 c. Polyester and vinyl ester resins resin pre polymer oligomer 40 to 100 typically 55 65 provides polymer properties including modulus toughness glass transition temperature and durability. Vinyl esters have enhanced mechanical properties compared to polyesters with physical strength better impact and thermal shock resistance. Vinyl ester resin is selected due to its well known performance in marine conditions and good chemical resistance to a wide range of chemicals including sour crude up to 100 c.