Extension of the Application Range of Multipolar Bonded Ring Magnets by Thermosets in Comparison to Thermoplastics
Abstract
:1. Introduction
1.1. Magnetic Properties
1.2. Injection Moulding
1.3. Aim of the Paper
2. Materials and Methods
2.1. Materials
2.2. Fabrication of the Test Specimens
2.3. Characterization
2.3.1. Differential Scanning Calorimetry (DSC) According to DIN EN ISO 11357
2.3.2. Determination of the Viscosity Using a Rotational Viscometer According to DIN EN 6043
2.3.3. Determination of the Viscosity Using a High Pressure Capillary Rheometer According to DIN 54811 (Withdrawn by Now)
2.3.4. Mechanical Properties According to DIN EN ISO 527
2.3.5. Magnetic Properties
2.3.6. Filler Orientation
3. Results
3.1. Reaction Kinetics According to Differential Scanning Calorimetry (DSC)
3.2. Viscosity According to a Rotational Viscometer
3.3. Viscosity According to a High-Pressure Capillary Rheometer
3.4. Mechanical Properties
3.5. Magnetic Properties
3.6. Filler Orientation
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Appendix A
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Matrix Material | Density φ in g∙cm−3 | Heat Capacity c in J∙g−1∙°C−1 | Thermal Conductivity λ in W∙m−1∙K−1 | Peak Temperature Tpeak in °C |
---|---|---|---|---|
Polyamide 12 (PA12) | 1.000 | 1.840 | 0.23 | 180.1 (1) |
Epoxy resin (EP) | 1.225 | 1.616 | 0.4–0.6 | 170.1 (1) |
Phenolic resin (PF) | 1.292 | 1.294 | 0.4–0.6 | 138.1 (2) |
Filler Material | Density φ in g∙cm−3 | Heat Capacity c in J∙g−1∙°C−1 | Thermal Conductivity λ in W∙m−1∙K−1 | Mean Particle Size d50 in µm | |
---|---|---|---|---|---|
Numerical | Volumetric | ||||
SrFeO | 5.380 | 0.639 | 2.3 | 4.87 | 1.94 |
Matrix Material | PA12 | EP | PF | ||
---|---|---|---|---|---|
Sample Type | Ring/Plate | Ring | Plate | Ring | Plate |
Process Conditions | |||||
mass temperature, Tm in °C | 280 | 85 | 85 | 85 | 85 |
mould temperature, TWZ in °C | 80 | 190 | 200 | 180 | 180 |
holding pressure, ph in bar | 500 | 650 | 250 | 650 | 250 |
heating time, th in s | - | 200 | 300 | 45 | 120 |
injection speed, vin in mm∙s−1 | 40 | 15 | 15 | 15 | 15 |
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Rösel, U.; Drummer, D. Extension of the Application Range of Multipolar Bonded Ring Magnets by Thermosets in Comparison to Thermoplastics. Magnetism 2023, 3, 71-89. https://doi.org/10.3390/magnetism3010007
Rösel U, Drummer D. Extension of the Application Range of Multipolar Bonded Ring Magnets by Thermosets in Comparison to Thermoplastics. Magnetism. 2023; 3(1):71-89. https://doi.org/10.3390/magnetism3010007
Chicago/Turabian StyleRösel, Uta, and Dietmar Drummer. 2023. "Extension of the Application Range of Multipolar Bonded Ring Magnets by Thermosets in Comparison to Thermoplastics" Magnetism 3, no. 1: 71-89. https://doi.org/10.3390/magnetism3010007