Elastomeriske

Elastomeriske is an adjective used to describe materials with elastomeric properties, i.e., polymers that exhibit rubber-like elasticity under normal conditions. In practice, elastomeriske materials are crosslinked polymer networks that can undergo large reversible deformations with relatively low stiffness.

Common elastomeriske materials include natural rubber (polyisoprene) and a range of synthetic rubbers such as styrene-butadiene rubber (SBR), polybutadiene rubber (BR), nitrile rubber (NBR), ethylene propylene diene monomer rubber (EPDM), and silicone rubbers; polyurethane elastomers and fluorinated elastomers are also used where chemical resistance is critical. These materials typically have a glass transition temperature at or below ambient, enabling flexibility, and display viscoelastic behavior, combining elastic recovery with energy dissipation.

Manufacture generally involves polymerization to form the backbone followed by crosslinking, known as vulcanization for natural and most synthetic rubbers, or addition/condensation curing for other elastomers. Crosslink density controls properties such as hardness, tensile strength, and elongation at break.

Applications cover seals, gaskets, vibration dampers, tires, hoses, flexible coatings, and medical devices. Elastomeriske coatings can provide impermeability, weathering resistance, and elasticity to accommodate substrate movement.

Limitations include temperature sensitivity, aging due to oxygen, ozone, or UV exposure, and degradation by certain chemicals. Material selection depends on factors such as temperature range, chemical environment, and required elasticity.