DYNAMIC MODULUS 3 FRICCIÓN INTERNA 3 INTERNAL FRICTION 3 MÓDULOS DINÁMICOS 3 NON-LINEAR VISCOELASTICITY 3 OSCILADOR PIEZOELÉCTRICO 3 PIEZOELECTRIC OSCILATOR 3 POLÍMEROS VINÍLICOS 3 VINYL POLYMERS 3 VISCOELASTICIDAD NO-LINEAL 3 Activation volume 2 Damping 2 Impact polystyrene 2 Internal friction 2 Mechanical testing 2 Polymethyl methacrylates 2 Polystyrenes 2 Polyvinyl chlorides 2 Strain amplitude 2 Strain rate 2 Stress relaxation 2 Stresses 2 Temperature 2 Vinyl polymer 2 Vinyl resins 2