Loss modulus is a measure of the energy dissipated as heat in a material when it is subjected to cyclic loading, representing the viscous response of a viscoelastic material. It quantifies how much energy from an applied stress is lost rather than stored, playing a crucial role in understanding a material's viscoelastic behavior under dynamic conditions. Loss modulus is important for characterizing the damping properties of polymers and helps establish relationships between temperature, time, and mechanical behavior.
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