Plastic board: Plastic board is made of plastic sheet, plastic is a synthetic polymer compound, which can freely change the shape and style. Plastic is a material made by synthesis or condensation reaction of monomer raw materials. It is composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, and pigments. Its main component is synthetic resin. ①Most plastics are light in weight, chemically stable, and will not rust; ②Good impact resistance; ③Good transparency and wear resistance; ④Good insulation, low thermal conductivity; ⑤General formability and colorability Good, low processing cost; ⑥Most plastics have poor heat resistance, high thermal expansion rate, and easy to burn; ⑦Poor dimensional stability, easy to deform; ⑧Most plastics have poor low temperature resistance and become brittle at low temperatures; ⑨Easy to age; ⑩Some plastics are easy to Soluble in solvents.
There are basically two types of plastic polymer structures: the first is a linear structure, and a polymer compound with this structure is called a linear polymer compound; the second is a body structure, which has The polymer compound of this structure is called a bulk polymer compound. Some macromolecules are branched, called branched macromolecules, which are linear structures. Although some polymers have cross-links between molecules, they are less cross-linked, which is called a network structure and belongs to a body structure. Two different structures show two opposite properties. Linear structure (including branched chain structure) polymers are elastic and plastic due to the existence of independent molecules, can be dissolved in solvents, can be melted by heating, and have low hardness and brittleness. Since there are no independent macromolecules in the body structure polymer, it has no elasticity and plasticity, cannot dissolve and melt, can only swell, and has greater hardness and brittleness. Plastics have two types of macromolecules. Those made of linear polymers are thermoplastics, and those made of body-shaped polymers are thermosetting plastics.