Dissipative properties

Electrical Properties. (See Table 1.) A new family of ABS products exhibiting electrostatic dissipative properties without the need for nonpolymeric additives or fillers (carbon black, metal) is now also commercially available (2). 

We have examined the many of the various factors that determine the proper boundary condition to use at the solid-liquid interface and considered many of the models associated with theses factors. The single-valued slip length model is the simplest and most convenient boundary condition, and it has been used successfully in many studies. However, it cannot describe coupling changes where there are changes in both the storage and dissipation properties. In this situation, a two-parameter complex value may be necessary. 

MSN.70. A. P. Grecos and I. Prigogine, Dissipative Properties of Quantum Systems, Proc. Natl. Acad. Set 69, 1629-1633 (1972). 

Usually antistatic agents develop their full activity only after a couple of days. The almost instantaneous antistatic action is extremely important during the production of films where operators are exposed with static built up on the extrusion equipment. Thus, the additive is useful in applications where dissipative properties are important, such as supported or unsupported sheets forming... 

The thermal conductivity (in W m 1 K-1) of PDMS (0.15) appears to be sufficient, although it is lower than PC (0.16), PET (0.2), glass (0.7-1.0), fused silica (1.38), and silicon (124) [159,246]. Since the channels in the plastic chip are usually narrow (i.e., with high surface-to-volume ratio), the heat dissipation properties of the plastic (e.g., acrylic) channel compared favorably with that of a fused silica capillary (75 pm i.d.) [186]. 

We believe that the arguments above should convince the reader that the interesting phenomenon detected by Carmeli and Nitzan is another manifestation of the decoupling effect, well understood at least since 1976 (see ref. 86). The only physical systems, the dissipative properties of which are completely independent of whether or not an external field is present, are the purely ideal Markovian ones. Non-Markovian systems in the presence of a strong external field provoking them to exhibit fast oscUlations are characterized by field-dependent dissipation properties. These decoupling effects have also been found in the field of molecular dynamics in the liquid state studied via computer simulation (see Evans, Chapter V in this volume). 

In Section 3 we present the Dispersion and Dissipation properties for Runge-Kutta methods. Based on these properties we have constructed ... 

Dispersion and Dissipation Properties for Explicit Runge-Kutta Methods... 

Construction of Runge-Kutta Methods which is Based on Dispersion and Dissipation Properties. - 3.2.1 A dispersive-fitted and dissipative-fitted explicit Runge-Kutta. We consider a 6-Stage explicit Runge-Kutta method ... 

The tissue has been modeled from a continuum mechanics point of view by Jfow and students (11,12,13). The model treats cartilage as a blphaslc material (the solid"organic matrix was assumed, for these purposes, to be one "phase" and the water the other). The "solid" organic matrix was further assumed to behave as a single Kelvln-Voigt body whose viscoelastic properties are attenuated by the frictional resistance to fluid flow from the tissue. Attempts were made to use this model to explain the load-strain and load dissipation properties of the tissue for the experimental configuration described In this paper (15),... 

Enzymatic Polymerization Products Possess Increased Energy Dissipation Properties. Interestingly, starting at point 2 in Fig. 4b, the/ and R values... 

For the first measurements we followed the evolution of y(t) during the adsorption process. After having reached equilibrium, the complex surface dilatational modulus e is obtained from the response of the surface to a sinusoidal dilatation/compression deformation. As usual, the real part corresponds to the elastic properties and the imaginary part to the dissipative properties ... 

Dissipation phenomena generally occur during measurement of the adherence of polymer materials, leading to an adherence energy function of both the number and nature of interfacial interactions (adhesion) and dissipative properties, mainly due to viscoelastic behavior [1-5]. Friction properties of polymers are also governed by interfacial interactions and dissipation mechanisms. Common phenomena (interfacial interaction and dissipation) therefore control adherence and friction behaviors. However, the relationship between the two phenomena is still vague or undefined. The first objective of this experimental work is then to compare adherence and friction of polydimethylsiloxane (PDMS) networks in order to establish relationships between these two properties. 

The value of the dissipative factor tan S=G IG for the four adhesive blends is shown in Fig. 22.21. Clearly the addition of diblock in the blend has no effect on the dissipative properties of the adhesives at high frequencies but it has a significant effect at low frequencies. A relaxation experiment such as that described in Fig. 22.20a and b involves a very slow growth of interfacial cracks, precisely in the regime where linear viscoelastic properties differ. We can therefore propose, at least qualitatively, that the spectacular improvement in adhesive properties observed for the high diblock adhesives on EP surfaces is due to their more dissipative character, which slows crack propagation considerably at the interface, therefore avoiding early coalescence between separate cavities, and favors the formation of a fibrillar stracture with the cavity walls. 

DMA provides materials scientists, pol5mer chemists, and design engineers with detailed information on the elastic and inelastic (plastic) deformation of materials, modulus, and damping (energy dissipation) properties of materials. The damping behavior of S5mthetic and natural mbbers is important in vibration and acoustic application, for example. 

Smart materials. Materials that have the capability to respond to an external stimulus by changing, in a controlled manner according to prescribed functional relationships or control algorithms, their energy dissipation properties and geometric configuration, or by changing their stiffness. 

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