Temperature dependence of dynamics

Figure 1. Temperature dependence of dynamic modulus and loss tangent (11 Hz) of monomer I cured for 7 days at 280°C.

Sugiyama, M. and Norimoto, M. (1996). Temperature dependence of dynamic viscoelasticities of chemically treated woods. Mokuzai Gakkaishi, 42(11), 1049-1056. 

FIGURE 2.18 Temperature dependence of dynamic storage modulus for the samples with different groove orientation. 

WLF equation provides a good description of the temperature dependence of dynamics for non-crystalline polymers in the temperature range Eg < r < Eg + 100 K. The choice of reference temperature is completely... 

Temperature dependence of dynamics 8.7.2 Transition zone of polymer melts... 

Figure 9.14 Temperature dependence of dynamic tensile moduli at 10 Hz for iPP/EHR57 (75/25) (closed symbols) and sPP/EHR57 (75/25) (open symbols). (From Reference 31 with permission from American Chemical Society.)...

Figure 9.43 Temperature dependence of dynamic tensile moduli for the MD (open symbols) and the TD (closed symboles) (a) iPP, (b) iPP/EHR30, and (c) iPP/EHR53. (From Reference 65 with permission from John Wiley Sons, Inc.)...

Abramovic, H. and Klofuta, C. 1998. The temperature dependence of dynamic viscosity for some vegetable oils, Acta Chim. Sloven., 45, 69. 

For simple liquids, the temperature dependence of dynamics is usually given by a form that is known as the Arrhenius equation. For relaxation time, the Arrhenius... 

Figure 3.12. Temperature dependence of dynamic modulus E and dynamic loss modulus E" for PVC/ PBD blends (an incompatible system) (—) 100/0 (---) 100/5 (-----) 100/15. Note the two dis-...

Fig. 1.7 The temperature dependence of dynamic susceptibility measured on different frequencies. Curves 1-11 correspond to frequencies from 0.51 Hz till 51-10 Hz, xfc is static susceptibility measured in zero magnetic field [25]...

Time and Temperature Dependences of Dynamic Moduli 10.2.1 Plain Ageing... 

Zar] have shown non-monotonous temperature dependencies of dynamic yield and fracture stress of two refractory Ni based Co-Fe-Ni alloys (IN738LC and PWA 1483) for gas turbines measured under... 

FIGURE 12. Temperature dependence of dynamic elastic modulus E and los tangent tan 6 for sample membranes cast from TFE (1) PMLG-12, (2) MBM-14, and (3) MBM-12. 

Fig. 3. Typical temperature dependence of dynamic modulus G and loss factor tan 8 for crystalline...

In the dynamic mechanical tests, either a vibrational force or a deformation is applied to the specimen, and then the sinusoidal response of either the deformation or force is measured, respectively. The dynamic mechanical properties are measured as a function of frequency at a constant temperature or as a function of temperature. The temperature dependence of dynamic viscoelasticity is conveniently used by the plastic industry to characterize solid polymers. Recently, various kinds of equipment for measuring dynamic viscoelasticity are commercially available and widely used for scientific and practical purposes. 

Even though the mode of failure depends on the relationship between AH, and Uo, we have observed in the past that the strength of both brittle and ductile polymers is related only to their respective AH values [834, 835]. These are obtainable from the temperature dependence of dynamic mechanical or dielectric loss determinations of Tg [836], The magnitude of the activation volume CO can be calculated from the empirical equations [170]... 

Although the frequency can be varied somewhat by changing the moment of inertia of the oscillating portion of the mechanism, torsion pendulums are usually intended to study only the temperature dependence of dynamic properties at a constant, relatively low frequency ( 1 cycle/s). On the other hand, they are inexpensive and rather simple to constmct. 

R. J. Loncharich, B. R. Brooks, Temperature dependence of dynamics of hydrated myoglobin Comparison of force field calculations with neutron scattering data, J. Mol. Biol. 215 (1990) 439-455. 

Temperature Dependence of Dynamic Moduli of TPU during Isochronal Dynamic Temperature Sweep Experiment... 

Figure 12.52 describes the temperature dependence of dynamic storage modulus G during the isochronal dynamic temperature sweep experiment at an angular frequency (ty) of 0.1 rad/s for PS, PS-t-COONa, (PS-t-COONa)/Cloisite 20A nanocomoposite, and (PS-t-COONa)/Cloisite 30B nanocomposite. The following observations are worth noting in Figure 12.52. Not only is the magnitude of G for PS-t-COONa much larger than that for neat PS, but also the values of G for PS-t-COONa decrease slowly, as compared with the values of G for neat PS, with increasing temperature. We attribute this observation to the formation of ionic clusters in PS-t-COONa. It has been reported...

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