Thermoset plastic to thermosetting resin as the main component, with a variety of necessary additives through the crosslinking curing process into the formation of products of plastic.
Thermosetting plastics can be softened when heated for the first time to flow, heated to a certain temperature, resulting in a chemical reaction a cross-linking reaction and curing and hardening, this change is irreversible, and thereafter, when heated again, can not be softened to flow.
It is with the help of this characteristic that the molding process is carried out, using the plasticized flow at the time of the first heating, filling the cavity under pressure, and then curing the product into a definite shape and size.
Thermosetting plastics are characterized by a chemical reaction that hardens the plastic at a certain temperature after a certain period of time by heating, pressurizing, or adding a hardener.
After hardening, the chemical structure of the plastic changes, and its hard texture, is insoluble in solvents, heating is no longer softened, if the temperature is too high for decomposition.
Thermoplastic resin molecular chains are linear or with the structure of the branched chain, with no chemical bonding between molecular chains, and softening flow when heated. The process of cooling and hardening is a physical change.
Common thermosetting plastics are phenolic plastics, epoxy plastics, amino plastics, unsaturated polyester, alkyd plastics, and so on.
Introduction—Thermoset vs Thermoplastic Table of Contents Introduction—Thermoset vs Thermoplastic What are Thermoset Plastics? Applications of Thermosetting Plastics Thermosets Molding process Disadvantages of Thermosets What are Thermoplastics? Applications of Thermoplastics Thermoplastics Molding process Advantages and Disadvantages of Thermoplastics Advantages of Thermoplastics…