Thermoplastics can be melted and reshaped over and over again, while thermosetting plastics can only be heated and shaped once. Items made from thermoplastics can easily deform when they are exposed to heat, while those that are made of thermosetting plastics cannot.Know More
All plastics are categorized into either thermoplastics or thermosetting plastics. Unlike thermoplastics, thermosetting polymers form bonds that are not reversible during the curing process. As thermoset plastics can withstand heat, they are used in the manufacture of the handles and lid knobs of cooking pots and in electrical insulation. The items are hard, stiff and resist chemicals.
On the other hand, thermoplastics are used to manufacture kitchen equipment, such as cups, jugs, containers, bottles and plastic spoons. In addition, they make simple home tools and implements, such as piping, wash basins, combs and toys. Thermoplastics can be further categorized into nylon, acrylic, polypropylene, polystyrene, low-density polythene and high-density polythene. The six categories of plastics have different properties of color, degree of malleability and weight.
Similarly, thermoset plastics can be categorized into different types: epoxy resin, melamine formaldehyde, polyester resin and urea formaldehyde. These categories of thermosetting plastics have varying degrees of stiffness, textures and levels of resistance to chemicals.Learn more about Thermodynamics
An isochoric process is a process in thermodynamics where the performance of work depends on the volume. The volume of a closed system undergoing an isovolumetric process remains constant during the process. In this case, the system does not work because the volume is constant.Full Answer >
The formula for calculating thermal conductivity is heat multiplied by the distance divided by the product of surface area times the temperature gradient. NDT Resource Center explains that thermal conductivity is the property of a material to conduct heat. Increased thermal conductivity means a higher rate of heat transfer.Full Answer >
Potential and kinetic energy are the two types of mechanical energy. An object stores potential energy and expends it as kinetic energy when it is in motion. Potential energy generally involves an object's potential for movement as a result of its place within the gravitational field of the Earth.Full Answer >
One example of a science project involving insulation is to measure the effects of an insulating container on the transmission of heat from a warm beverage. The comparison involves measuring temperatures at which people could comfortably pick up a cup of that beverage, using cups made of different materials.Full Answer >