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{{Continuum mechanics|cTopic=rheology}}
'''Viscoelasticity''' is a material property that combines both viscous and elastic characteristics. Many materials have such viscoelastic properties. Especially materials that consist of large molecules show viscoelastic properties. [[Polymer|Polymers]] are viscoelastic because their macromolecules can make temporary entanglements with neighbouring molecules which causes elastic properties<ref>{{Cite book |last=Doi |first=M |title=The theory of polymer dynamics |date=1986 |publisher=Oxford University Press |year=1986 |isbn=0198520336}}</ref>. After some time these entanglements will disappear again and the macromolecules will flow into other positions (viscous properties).
A viscoelastic material will show elastic properties on short time scales and viscous properties on long time scales. These materials exhibit behavior that depends on the time and rate of applied forces, allowing them to both store and dissipate energy.
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