Segmented mixing element

This device has serial in-channel mixing elements composed of convex and concave units [146]. The mixer was made in two versions with short units (200 pm) and long segments (400 pm). 

Taylor-Flow Microreactors Taylor-flow microreactors contain a dispersing mixing element for gas and liquid streams, typically of Tand Y shapes, followed by a reaction channel for the segmented gas-liquid flow, often of quite extended length, as the Taylor flow is dominant in typical flow-pattern maps [230,248-250]. In general, all Taylor-flow microreactors can induce other flow patterns as well as the ones mentioned above. 

Figure 3.1 Microreactor featuring a multichannel microfluidic element fabricated from PDMS [21]. Panel a the fully assembled microreactor. Panel b microstructured multichannel plate. Panel c electron micrograph of a segment of a microfluidic channel that shows a passive mixing element.

The free energy of mixing polymer segments with solvent in the volume element 5F, obtained from 5(AaSm ) in conjunction with a term kTxi niV representing the standard state free energy of mixing (see Eq. 20), is... 

Then from Eq. (40) the free energy of mixing segments and solvent in the initial state in which the two volume elements are well separated is... 

Customized and flexible screw-element and barrel segment designs, and fast and efficient melting and mixing (both dispersive and distributive) in most TSEs make such equipment very well suited and almost exclusively used for the following polymer processing operations ... 

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