Flow Forced High-Elasticity

It is known [2], that the turbulent structures fiuctality is one of the key properties of turbulent motions. It is accepted to asstrme, that energy dissipation in three-dimensional turbulent currents is concentrated on multitude 

If to consider the cluster network density v j as N and to choose statistical segment length / as the scale, then the Eq. (6.1) is changed as follows 

The value of amorphous pol5miers cluster structure was determined according to the mechanical tests results (the Eqs. (1.9) and (2.20)). 

In Fig. 6.1, the relation ship between v, and is adduced for PC and PAr, which turns out to be linear and, hence, corresponds to the Eqs. (6.1) and (6.2). Thus, the value v, (or (p j) can be considered as an analog of active whirls number on segmental level. 

Goldstein and Mosolov [8] offered the general relationship for estimation of fractal liquid viscosity t (/)  

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For determination of cold flow (forced high-elasticity) macroscopic... 

Hence, the cluster model of pol5nners amorphous state structure and the model of WS aggregates friction at translational motion in viscous medium [24] combination allows to describe solid-phase polymers behavior on cold flow (forced high-elasticity) plateau not only qualitatively, but also quantitatively. In addition the cluster model explains these polymers behavior features on the indicated part of diagram a - , which are not responded to explanation within the frame woiks of other models [14]. 

Let us suppose, that the forced high-elasticity (cold flow) plateau stress Gp of amorphous polymers will be the higher the larger polymer viscosity T (/ ) will be. In this case the following relationship should be fiilfilled [7] ... 

Foams that ate relatively stable on experimentally accessible time scales can be considered a form of matter but defy classification as either soHd, Hquid, or vapor. They are sol id-1 ike in being able to support shear elastically they are Hquid-like in being able to flow and deform into arbitrary shapes and they are vapor-like in being highly compressible. The theology of foams is thus both complex and unique, and makes possible a variety of important appHcations. Many features of foam theology can be understood in terms of its microscopic stmcture and its response to macroscopically imposed forces. 

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