Materialabbau während der Verarbeitung auf Einschneckenmaschinen
During the processing of polymers the molecules are thermically and mechanically stressed. These conditions can lead to a change of the molecular structure and to decomposition. The molecular degradation during the processing of polymers on plasticating units is of growing interest as the focus today lies in raising the screw speed in order to increase the output. In the following a degradation model is presented, which explain the possibilities of increasing the screw speed. The plasticating unit is regarded as a black box. With the knowledge of the residence time and the average melt temperature at the exit the reduction of the molecular weight can be determined. This analytical approach enables new possibilities for processing polymers beyond known maximum allowable melt temperatures.
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The Journal of Plastics Technology is a peer reviewed internet periodical published under the auspices of the Scientific Alliance of Polymer Technology (WAK)
International Polymer Processing, the journal of the Polymer Processing Society, is a discussion forum for the world-wide community of engineers and scientists in the field of polymer processing.
The journal covers research and industrial application in the very specific areas of designing polymer products, processes, processing machinery and equipment.
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