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Soft tooling processes use flexible polymeric materials to manufacture moulds. However, the malleable materials used for soft tooling, such as silicone rubber, have low thermal conductivities and take an extensive amount of time to cool. In this study, metallic (Aluminum fine powder, grey iron, copper, magnesium, titanium, zinc) and non-metallic (graphite, silicone, glass) thermally conductive filler particles were added to silicone rubber to condense the cooling time of soft tooling ...
Adding thermally conductive fillers into flexible moulds has been proven to decrease the solidification time of the polymers. The aim of this study was to determine the thermal conductivity, thermal diffusivity, and specific heat of the flexible moulds polyurethane (PU) and silicone rubber (SR) after the addition of aluminum and graphite. Thermal properties were measured using the transient plane source (TPS) method. Results showed that the thermal conductivities of particulate ...
Resin polymers, such as Polymethyl methacrylate (PMMA), have been used in denture fabrication because of their easy molding ability and flawless appearance. However, these PMMAs are not the most desirable material when dealing with mechanical strength, electrical conductivity and thermal stability. In this study, the addition of fillers, such as Nano-Aluminum Oxide (Nano-Al2O3) and plasma treated polypropylene (PP) fibers, to these polymers has been explored. Nanocomposites are desired in ...
The effects of the addition of three different fillers to a polymer matrix on the thermo-physical properties of the resulting composites were investigated by the authors. Boron nitride, synthetic diamond, and silicon nitride were used as the fillers (up to 2 vol. %), and it was found that their addition did increase the thermal conductivity relative to that of the pure epoxy matrix. Furthermore, it was determined that the thermal conductivities of ...
