Thermoset plastics are synthetic materials which undergo a chemical change during processing to strengthen and set them into a form. Examples of thermoset plastics include epoxy, silicone, amino, phenolic and unsaturated polyesters.Know More
Thermoset plastics are contrasted by thermoplastics, which soften when heated and strengthen and set into form as they are cooled. Thermoset plastics have a net-like structure of cross-linked polymers. Once they have undergone the initial chemical change during processing, they cannot be melted or remolded. They are also resistant to solvents.
Because of these basic properties, thermoset plastics are inherently strong and durable even under high-heat conditions, although they are somewhat brittle. These plastics are often used to make large and/or permanent parts or shapes such as automobile bodies. They are also used in electronic chips, polymer coatings, the coatings on eyeglasses and in dental fillings. Vulcanized rubber is another example of a thermoset plastic material.
Thermoset plastics are typically produced by heating a powder or liquid in a mold. The chemical change that sets the thermoset plastics may or may not have to do with the application of heat. In some cases, it is the result of the chemical interactions of the components. Each type of thermoset plastic has its own set of unique properties.Learn more about Thermodynamics
Two objects in physical contact with each other are in thermal equilibrium when they reach the same temperature and an exchange of heat energy no longer occurs. According to HyperPhysics, the relation of thermal equilibrium follows the Zeroth Law of Thermodynamics, which states that “if two systems are at the same time in thermal equilibrium with a third system, they are in thermal equilibrium with each other.”Full Answer >
Thermal energy is used primarily for heating and cooling buildings and for certain industrial processes. Wood and pellet stoves are commonly used to heat homes. Certain factories can use thermal energy to create steam to run their production sites. This is known as biomass thermal energy.Full Answer >
Gel hand warmers work by storing sodium acetate in a liquid state, and then allowing it to rapidly crystallize. Because sodium acetate has a freezing point of 130 degrees Fahrenheit, it rapidly increases to this temperature when it crystallizes.Full Answer >
Geothermal power is generated by capturing and utilizing the steam and hot water produced by geothermal springs. As cold water seeps into the Earth’s crust, a layer of hot and molten rock heats it up and causes it to rise to the surface, where it’s used to power turbines.Full Answer >