Next Article in Journal
Discrete Element Simulation of Orthogonal Machining of Soda-Lime Glass with Seed Cracks
Previous Article in Journal
High-Temperature Diffusion Bonding of Ti–6Al–4V and Super-Duplex Stainless Steel Using a Cu Interlayer Embedded with Alumina Nanoparticles
Open AccessFeature PaperArticle

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites

1
Department of Mechanical Engineering, University of Alberta, 9211-116 St. NW, Edmonton, AB T6G 1H9, Canada
2
Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
3
Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
*
Author to whom correspondence should be addressed.
J. Manuf. Mater. Process. 2020, 4(1), 4; https://doi.org/10.3390/jmmp4010004
Received: 20 December 2019 / Revised: 8 January 2020 / Accepted: 9 January 2020 / Published: 12 January 2020
Polymer bonded permanent magnets find significant applications in a multitude of electrical and electronic devices. In this study, magnetic particle-loaded epoxy resin formulations were developed for in-situ polymerization and material jetting based additive manufacturing processes. Fundamental material and process issues like particle settling at room temperature and elevated temperature curing, rheology control and geometric stability of the magnetic polymer during the thermal curing process are addressed. Control of particle settling, modifications in rheological behavior and geometric stability were accomplished using an additive that enabled the modification of the formulation behavior at different process conditions. The magnetic particle size and additive loading were found to influence the rheological properties significantly. The synergistic effect of the additive enabled the developing of composites with engineered magnetic filler loading. Morphological characterization using scanning electron microscopy revealed a homogenous particle distribution in composites. It was observed that the influence of temperature was profound on the coercive field and remanent magnetization of the magnetic composites. The characterization of magnetic polymers and composites using rheometry, scanning electron microscopy, X-ray diffraction and superconducting quantum interference device (SQUID) magnetometry analysis enabled the correlating of the behavior observed in different stages of the manufacturing processes. Furthermore, this fundamental research facilitates a pathway to construct robust materials and processes to develop magnetic composites with engineered properties. View Full-Text
Keywords: material jetting; magnetic composites; polymer formulation; particle settling; material behavior control; magnetic characterization material jetting; magnetic composites; polymer formulation; particle settling; material behavior control; magnetic characterization
Show Figures

Figure 1

MDPI and ACS Style

Nagarajan, B.; Kamkar, M.; Schoen, M.A.; Sundararaj, U.; Trudel, S.; Qureshi, A.J.; Mertiny, P. Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites. J. Manuf. Mater. Process. 2020, 4, 4.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop