By H.E.H. Meijer (editor)
Fabrics technology and know-how is a seminal paintings and crucial reference providing entry to a veritable compendium of knowledge masking crucial sessions of fabrics present in undefined, together with: metals, ceramics, glasses, polymers, semiconductors and composites. also, fabrics technology and know-how offers with the purposes, processing, and primary ideas linked to those fabrics. It in actual fact and comprehensively offers the person with information from learn and at the houses, training and strength of the person sessions of fabrics.
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Additional info for Processing of Polymers
3 of this Volume for further details]. As a consequence, only simple mixing should be analyzed in these regions of the flow, and the focus should be on obtaining exponential rather than linear stretching of the dispersed phase (Sec. 2). If the capillary number approaches the value of one, by a continuous decrease in the radius of the deformed long slender threads which are formed, Rayleigh distortions grow and the threads disintegrate into lines of drops (Sec. 3). In a real mixing process, a quasi-stationary situation will result where drop break up and drop coalescence equilibrate, and simple models have been derived for liquid-solid and liquid-liquid dispersions in elementary geometries (Sec.
Also, both networks can be formed simultaneously or sequentially. Depending on the chemical or physical nature of the network, crosslinks or entanglements, or combinations of both, the nomenclature is different. The above examples can be classified as semi-IPNs. Not only is the introduction of processability an important issue in these systems, but a controlled phase separation is also of importance for obtaining the desired properties in the final product. , with hard and soft segments, as in polyurethanes, chemically induced phase separation can yield unique morphologies and the monitoring thereof is of great practical use.
This is not a straightforward task. , 1993; Meijer and Janssen, 1994; Janssen andMeijer, 1995). 3 Dispersive Mixing Figure 1-29. Resulting dimensionless line stretch S after n periods of identical protocols of blobs with initial size 0=5 mm positioned close to a hyperbolic H(o) or elliptical E(o) periodic point of order (o). Figure 1-29 a: w = 9, E(2) surrounded by H(6), 5=1800. 5, E(2), 5=1800. Figure 1-29c: n=10, H(2), 5=1700. , 1996, 1997). ) via flow simulations using these basic concepts. As stated above, exponential mixing continuously decreases the length scale of the dispersed phase in the direction perpendicular to the flow, and once the radius of the threads formed are of the order of 1 \±m, typical for polymer blends, the interfacial tension becomes dominant and Rayleigh distortions grow with (as a driving force) the decrease in the surface-to-volume ratio.