Specific weight of resin, properties, modifications and value table

Resins are a broad class of natural and synthetic materials. In construction, repair and industry, epoxy, polyester, phenol-formaldehyde and other synthetic resins are especially common. After curing, they form strong polymer materials with good adhesion and resistance to chemical exposure.

The properties of a resin depend on its type, grade, composition, amount of fillers, hardener and curing conditions. Therefore, exact density and weight values should be checked in the technical documentation for the specific material.

Weight and specific weight of resin

The average reference specific weight of liquid resin is often taken as about 1.07 g/cm3. This means that 1 m3 of such resin weighs approximately 1070 kg. For modified compositions, filled resins and cured materials, the value can differ noticeably.

Specific weight and weight of 1 m3 of resin

Properties of resin

Resins can have high adhesion to metals, concrete, wood, glass and other materials. Many cured resins are resistant to water, alkalis, salts and a range of chemicals, but resistance always depends on the specific composition and operating conditions.

In appearance, resins may be transparent, yellowish, brown, viscous liquids or solid masses. Color, viscosity and curing time depend on the resin type, additives and temperature.

For pure epoxy resins without special fillers, the following approximate values are typical:

• elastic modulus about 3000-4500 MPa;
• tensile strength around 70-90 MPa;
• density of many compositions about 1.1-1.2 g/cm3.

Uncured resins, hardeners and solvents can irritate the skin, respiratory tract and eyes. When working with them, gloves, ventilation and the manufacturer’s instructions should be used. After full curing, the material usually becomes much more stable, but safety also depends on the composition.

Resin modification

Resins are well suited to modification. Physical and chemical modification are usually distinguished.

Physical modification consists of adding substances that change material properties without necessarily forming new chemical bonds with the base resin. For example, rubber additives can increase impact toughness, while mineral fillers can increase stiffness, heat resistance, wear resistance or ultraviolet resistance.

Chemical modification is related to changing the polymer structure or introducing reactive components. Such additives can increase elasticity, fire resistance, water resistance, adhesion or antifriction properties, but sometimes reduce other characteristics at the same time. Therefore, the resin composition is selected for specific operating conditions.