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Dynamic particle analysis for the evaluation of particle degradation during compounding of wood plastic composites
Affiliation:1. Faculty of Forest Sciences and Forest Ecology, Section of Wood Biology and Wood Products, University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany;2. Institute of Mechanical Wood Technology, Dpt. of Wood Sciences, University of Hamburg, Leuschnerstraße 91c, D-21031 Hamburg, Germany;3. DFG Research Training Group GRK 1703 “Resource Efficiency in Interorganizational Networks”, University of Göttingen, Platz der Göttinger Sieben 3, D-37073 Göttingen, Germany;1. Chair for Continuum Mechanics, Institute of Engineering Mechanics, Karlsruhe Institute of Technology (KIT), Kaiserstraße 10, 76131 Karlsruhe, Germany;2. Chair for Ligthweight Technology, Institute of Vehicle Systems Technology, Karlsruhe Institute of Technology (KIT), Rintheimer-Querallee 2, 76131 Karlsruhe, Germany;3. Section Hybrid and Lightweight Materials, Institute for Applied Materials (IAM-WK), Karlsruhe Institute of Technology (KIT), Engelbert-Arnold-Straße 4, 76131 Karlsruhe, Germany;4. Department of Chemical and Biochemical Engineering, University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3K7, Canada;1. Department of Engineering, Università degli Studi di Ferrara, via Saragat 1, Ferrara, Italy;2. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale (INSTM Consortium – UdR Naples), Università degli Studi di Napoli Federico II, p.le Tecchio 80, 80125 Naples, Italy;3. Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, P.le E. Fermi 1, 80055 Portici, Italy;1. Dr. S.S. Bhatnagar University Institute of Chemical Engineering, Panjab University, Chandigarh, 160014, India;2. Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
Abstract:A dynamic image analysis method was applied for particle characterisation to study the effect of different process conditions during twin-screw compounding of WPC. The use of distributions based on different types of quantity is discussed with respect to their sensitivity to reveal the effects of different process conditions on particle degradation. Distributions based on length proved to be most suitable to represent the initially broad length distribution of the particles before processing. Sensitivity was strong enough to show differences in particle size after processing depending on process conditions. Particle size was reduced by more than 97% compared to initial size. Degradation was stronger with increasing wood content and when the screw design contained more mixing elements. The effect of screw speed and feed rate was dependent on filler content and screw design.
Keywords:A  Wood fibres  A  Wood  B  Microstructures  E  Extrusion
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