Microstructure Development and Monitoring in Reactive Blending

A more complicated mechanism of morphological development in a twin screw extruder has been considered in a reactive process in which chemical reactions play an important role. For the pinpose of analyzing the morphological development in a single and/or twin screw extruder, some techniques such as sampling nozzle attachment are used. 

24 and 7.25 illustrate the experimental results when monitoring the morphology development in the case of a maleated polypropylene (mPP)-polyamide (PA) binary reactive blending system (where A-1 1st kneading zone, A-2 intermediate, A-3 2nd kneading zone, A-4 die exit). 

In this study, a special technique was used to take molten samples directly from the desired position of a twin screw extruder (screw diameter 30 mm) during the extrusion operation [41]. This experimental device, which was developed at JSW, is shown in Fig. 7.23. These results indicate that the PP particle size rapidly decreases at the melting zone 

New technology to evaluate the structure development in a twin screw extruder has been proposed, for example, an on-line monitoring apparatus on the microstructure change in real time during operation as shown in Fig. 7.2. In this system, the microstructuie can 

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