Multiphase polymers processing

C. D. Han, Multiphase Plow in Polymer Processing, Academic Press, Inc., New York, 1981. 

Han, C.D. (1981) In Multiphase flow in polymer processing. Academic Press, chap 3... 

Chang Dee Han (1981), Multiphase flow in polym. processing, Academic, New York... 

Fig. 12.30 Schematic showing the velocity profile in the three-layer coextrusion through a rectangular channel. [Reprinted by permission from C. D. Han, Multiphase Flow in Polymer Processing, Academic Press, New York, 1981.]...

Large polarizations are seen to occur in multiphase polymer systems, principally due to the different conductivities in the dissimilar microdomains. Due to the low overall conductivities of these polymers, the polarizations occur at low, often subaudio, frequencies. In order to study these processes two computer-aided dielectric spectrometers have been developed. They differ in the type of excitation used A.C. versus step. Each... 

Han, C. D. In Multiphase Flow in Polymer Processing Academic New York, 1981. 

Han, C. (1981) Multiphase Flow in Polymer Processing, New York Academic Press. 

Utracki, L. A., The Rheology of Multiphase Systems, in Rheological Eundamentals of Polymer Processing, J. A. Covas, J. F. Agassant, A. C. Diogo, J. Vlachopoulos, and K. Walters, Eds., Kluwer Academic Publishers, Dordrecht 1995. 

Ottenbrite, R. M., Utracki, L. A., and Inoue, S., Eds., Current Topics in Polymer Science, Vol. 2, Rheology and Polymer Processing, Multiphase Systems, Hanser Pub., Munich (1987). 

The chemical engineer will be interested particularly in applying the basic principles of transport phenomena to problems involving separations processes, combustion, polymer processing, interfacial hydrodynamics, multiphase flow, and biomedical engineering. In all of these areas it will be the task of the chemical engineer to utilize the basic theory of transport phenomena innovatively in solving practical problems for the beneflt of society. 

An examination of all experimental results reveals that percolation theory displays distinct deficits when it comes to explaining the results observed. This shortcoming led to the development of a new theory that in addition to totally different processes responsible for the occurrence of conductivity, also postulates a fundamentally different view of the systems multiphase polymer systems are in a state of thermodynamic inequilibrium. 

The high-energy input necessary for preparing multiphase polymer systems or other colloidal systems pushes these systems far from equilibrium at a critical concentration the energy input and the entropy export are so far above their critical values (i.e. they are supercritical) that a self-organisation process occurs in the form of a phase transition. This is the short, summarised main principle on which the new viewpoint [37] is based. 

In contrast to equilibrium thermodynamics, the thermodynamics of irreversible processes portray the application of thermodynamic methods as dynamic and therefore time-dependent procedures. The name Prigo-gine must be mentioned in relationship to this—he received for his work in this area the Nobel Prize in the year 1977. A new, very complex thermodynamics originated from his examination method for chemical reactions, and was developed by us, to come to a successful description of heterogenous multiphase polymer systems. This theory interprets crazing fracture energy dissipation and fracture mechanism in a totally new way on the basis of dissipative structures in polymer blends and their dynamics, For a list of abbreviations used in this section sec page 610,... 

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