Rheological behaviour of highly filled materials for injection moulding and additive manufacturing : effect of particle material and loading

Bek, Marko (author), Gonzalez-Gutierrez, Joamin (author), Kukla, Christian (author), Pušnik Črešnar, Klementina (author), Maroh, Boris (author), Slemenik Perše, Lidija (author)

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.

• Language: English
• Keywords: highly filled materials, polypropylene binder, binder-filler interaction, particle-particle interaction, shear rheology, fused filament fabrication, ATR-FTIR, XPS
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 23 str.
• Numbering: Vol. 10, iss. 22, art. 7993
• PID: 20.500.12556/RUL-122938
• UDC: 678.742.3
• ISSN on article: 2076-3417
• DOI: 10.3390/app10227993
• COBISS.SI-ID: 38860291
• Publication date in RUL: 17.12.2020

Record is a part of a journal

• Title: Applied sciences
• Shortened title: Appl. sci.
• Publisher: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 11.11.2020

Secondary language

• Language: Slovenian
• Keywords: materiali z visokim deležem polnitve, vezivni sistem, polipropilen, polipropilensko vezivo, interakcija veziva in polnila, ciljno nanašanje slojev