TY - JOUR

T1 - Rheological Behaviour of Highly Filled Materials for Injection Moulding and Additive Manufacturing

T2 - Effect of Particle Material and Loading

AU - Bek, Marko

AU - Gonzalez-Gutierrez, Joamin

AU - Kukla, Christian

AU - Pušnik Crešnar, Klementina

AU - Maroh, Boris

AU - Slemenik Perše, Lidija

PY - 2020/11/2

Y1 - 2020/11/2

N2 - Within this paper, we are dealing with a mixture of thermoplastic polymer that is filled with inorganic fillers at high concentrations up to 60 vol.%. A high number of particles in the compound can substantially change the rheological behaviour of the composite and can lead to problems during processing in the molten state. The rheological behaviour of highly filled materials is complex and influenced by many interrelated factors. In the present investigation, we considered four different spherical materials: steel, aluminium alloy, titanium alloy and glass. Particles with similar particle size distribution were mixed with a binder system at different filling grades (30–60 vol.%). We showed that the rheological behaviour of highly filled materials is significantly dependent on the chemical interactions between the filler and matrix material. Moreover, it was shown that the changes of the particle shape and size during processing lead to unexpected rheological behaviour of composite materials as it was observed in the composites filled with glass beads that broke at high contents during processing.

AB - Within this paper, we are dealing with a mixture of thermoplastic polymer that is filled with inorganic fillers at high concentrations up to 60 vol.%. A high number of particles in the compound can substantially change the rheological behaviour of the composite and can lead to problems during processing in the molten state. The rheological behaviour of highly filled materials is complex and influenced by many interrelated factors. In the present investigation, we considered four different spherical materials: steel, aluminium alloy, titanium alloy and glass. Particles with similar particle size distribution were mixed with a binder system at different filling grades (30–60 vol.%). We showed that the rheological behaviour of highly filled materials is significantly dependent on the chemical interactions between the filler and matrix material. Moreover, it was shown that the changes of the particle shape and size during processing lead to unexpected rheological behaviour of composite materials as it was observed in the composites filled with glass beads that broke at high contents during processing.

KW - highly-filled polymers

KW - Binder

KW - Rheology

KW - FTIR-spectroscopy

KW - Highly filled materials

KW - Binder-filler interaction

KW - Polypropylene binder

KW - ATR-FTIR

KW - Fused filament fabrication

KW - XPS

KW - Particle–particle interaction

KW - Shear rheology

UR - http://www.scopus.com/inward/record.url?scp=85096023858&partnerID=8YFLogxK

U2 - https://doi.org/10.3390/app10227993

DO - https://doi.org/10.3390/app10227993

M3 - Article

VL - 10

SP - 1

EP - 23

JO - Applied Sciences : open access journal

JF - Applied Sciences : open access journal

SN - 2076-3417

IS - 22

M1 - 7993

ER -