Both thermosetting plastic as well as thermoplastic have high thermal as well as corrosion resistance but thermoplastic shows self-lubricating property because of its linear structure. While rubbing of wheels on the rails develops shear stress that causes linear structured molecules to slide over each other and act as lubricating property and reduces friction effect and greatly reducing efficiency of friction brakes. Thermosetting plastics do not have self-lubricating property and have high thermal resistance of around 200C to 300C which are suitable for this purpose. Some thermosetting plastic with high thermal resistance that can be used
Thermal properties of liquids play a major role in thermal related applications in industrial processes. The heat transfer property of any fluid is dependent mainly on its thermal conductivity. Conventional heat transfer fluids have poor thermal conductivity which makes them inadequate for high thermal applications. Scientists have tried to enhance the inherently poor thermal conductivity of such conventional heat transfer fluids using solid additives. Fine tuning of the dimensions of these solid suspensions in millimeter and micrometer ranges for getting better heat transfer performance have failed because of the drawbacks such as still low thermal conductivity, particle sedimentation, corrosion of components of machines, particle clogging, excessive pressure drops etc.
These materials are much like a thermoplastic material at room temperature but change to a thermosetting material at elevated temperature. They are cheaper and stronger then epoxy and many polyester resins. The disadvantage is their relatively high shrinkage during curing. The last one, polyethylene (PE), is one of the most versatile and widely used thermoplastics in the world because of its excellent properties like toughness, near-zero moisture absorption, excellent chemical inertness, low coefficient of friction, ease of processing and unusual electrical properties. Based on their properties, we can assume that the usage of these 4 composites are to complete the advantages and disadvantages from each composites to obtain the properties that we
This causes PMMA to be rigid, brittle, have a high glass transition temperature and little mold shrinkage.” (Website: http://steinwall.com) Acrylic is scratch resistant than polycarbonate and hardest thermoplastic. The hydrolyzed ester groups make poly methyl methacrylate to swell and dissolve in organic solvents. Its resistance towards other chemicals is very poor. The methyl group blocks the possibility of chain transfer reaction during pyrolysis (molecular breakdown into smaller molecules under heated conditions) and gets converted almost completely to
The performance of a composite material system depends mainly on the interfacial properties of the reinforcement and the matrix material . The interface controls the interactions between the reinforcement and the matrix and thus affects the mechanical property of the composites. The stress transfer from the matrix to the reinforcement occurs through the interface. The fiber/matrix adhesion plays an important role in the load transfer ability of the interface . Composites with multiscale reinforcements are typically those which contain nano- and micro-scale reinforcements simultaneously .
This makes it unsuitable for high temperature applications. PVC starts to decompose when the temperature reaches 140oC. Thus, the addition of heat stabilizers is necessary to make the processing of polymer rather possible. Electrical Properties: The polymer is a good electrical insulator but presence of the polar character decreases its insulating capability. The volume resistivity of the material is high and the tendency of fire resistance makes it suitable for a lot of electrical applications.
On the other hand, carbon fibers (CFs) have been widely used as reinforcements and even EM interference suppressors, because they have low density, exquisite mechanical and excellent EM shielding properties [13-15]. Based on these backgrounds, magnetite coatings on carbon fibers is a potential way to further enhance the EM shielding properties of carbon fibers. Magnetite have been successfully coated on many different substrates by a variety of deposition techniques such as sputtering  hydrothermal , molecular beam epitaxy  chemical bath technique , etc. Although these methods offer good control over film thickness, morphology, crystallinity and purity, they require costly equipment and consume considerable amounts of energy. The aqueous solution-based ED method can be performed at a relatively low temperature and low cost.
With 3D printers, mechanical parts are manufactured by laying down successive layers of molten plastic without dies (Kumar, 2010). But the strength of the mechanical plastic parts is not equivalent to conventionally manufactured ones. It is desirable to increase the strength of parts manufactured by the 3D printers. The use of carbon fiber reinforced plastics increases in aircraft and automobiles industries. Most of carbon fiber reinforced plastics have comparatively simple shapes such as plates and curved shells, and it is not easy to manufacture three-dimensional mechanical parts.
Regardless those disadvantages, Conc. is still one of the chosen materials in construction. Reinforced Conc. (RC) is a very complex composite material resulting from a combination of two materials, Conc. and steel, both of which have entirely different mechanical properties.
This is benefit especially in parts designed for bending stiffness. • It is a renewable resource, the production requires little energy, and Co2 is used while oxygen is given back to the environment. • Producible with low investment at low cost, which makes the material an interesting product for low-wage countries. • Eco-friendly processing, no wear of tooling, no skin problems. • Thermal recycling is possible, where glass causes problems in combustion furnaces.