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A New In‐line Optical System for Monitoring Residence Time during Polymer Processing Along a Twin‐Screw Extruder
Author(s) -
Mandarino Bianca da R.,
da Silva Ana Lúcia N.,
Michel Ricardo C.
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.202000065
Subject(s) - hue , plastics extrusion , rgb color model , polypropylene , residence time (fluid dynamics) , materials science , residence time distribution , extrusion , saturation (graph theory) , rotational speed , composite material , process engineering , analytical chemistry (journal) , computer science , mechanical engineering , chemistry , chromatography , mineralogy , mathematics , artificial intelligence , engineering , inclusion (mineral) , geotechnical engineering , combinatorics
Residence time (RT) is an important factor in the processing of molten materials, since it strongly influences the quality of the final product. In this study, a simple and low cost optical system is developed to determine residence time of polypropylene (PP) during its processing in a TeckTrill co‐rotational twin screw extruder. The temperature profile is 90/160/180/190/190/195/195/200/200/210 °C with a screw speed of 300 rpm and a feed rate of 2.3 kg h ‐1 , using a commercial tracer and different screw profiles. Through the capture of images of the processed material, obtained by a webcam at the matrix output, the developed program is able to calculate the average RGB (red‐green‐blue) color of the analysis area and convert it to the HSV (hue‐saturation‐value), generating a curve of color saturation as a function of time. The results suggest that the developed optical system is a potential suitable tool for in‐line RT measurements.