Influence of temperature on the packing dynamics of polymer powders

Lumay, Geoffroy; Francqui, Filip; Detrembleur, Christophe; Vandewalle, Nicolas

doi:10.1016/j.apt.2020.09.019

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Influence of temperature on the packing dynamics of polymer powders

Lumay, Geoffroy; Francqui, Filip; Detrembleur, Christophe et al.

2020 • In Advanced Powder Technology, 31 (10), p. 4428-4435

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/255834

DOI
10.1016/j.apt.2020.09.019

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Keywords :

Polymer powders; Packing dynamics

Abstract :

[en] Temperature influences drastically the physical properties of polymer powders. In the present study, the packing dynamics of polymer powders has been investigated with a modified version of GranuPack instrument, which is an improvement of the classical tapped density measurement. After the filling pro- cedure, the sample is heated and the evolution of the density is measured after each tap. For a selection of four polymers (polyamide 12, Polystyrene, Polyvinyl chloride and a thermoplastic polyurethane), the influence of temperature on the Hausner ratio and on the packing dynamics are analysed. We show that the packing dynamics is drastically influenced by temperature even far below the melting temperature Tm for semi-crystalline polymers and far below the glass-transition temperatures Tg for amorphous poly- mers. In addition, we show that the analysis of the packing dynamics at different temperatures allows to determine a characteristic temperature corresponding to the onset of caking. Finally, we show that this temperature is coherent with Differential Scanning Calorimetry (DSC) analysis.

Research center :

Group for Research and Applications in Statistical Physics (GRASP)
Center for Education and Research on Macromolecules (CERM)
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège

Disciplines :

Physics
Materials science & engineering
Chemistry

Author, co-author :

Lumay, Geoffroy ; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Group for Research and Applications in Statistical Physics (GRASP), Belgium

Francqui, Filip; Granutools, Awans, Belgium

Detrembleur, Christophe ; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium

Vandewalle, Nicolas ; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Group for Research and Applications in Statistical Physics (GRASP), Belgium

Language :

English

Title :

Influence of temperature on the packing dynamics of polymer powders

Publication date :

2020

Journal title :

Advanced Powder Technology

ISSN :

0921-8831

eISSN :

1568-5527

Publisher :

Elsevier, Netherlands

Volume :

Issue :

Pages :

4428-4435

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Available on ORBi :

since 26 January 2021

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