What is the resin exactly?
Classification of resinsAccording to resin synthesis reaction classification, according to resin molecular backbone composition classification1. classification by resin synthesisAccording to this method, resins can be divided into polymers and condensation polymers. Polymers are polymers made by addition polymerization, and their chain structures are chemically identical to those of monomers, such as polyethylene, polystyrene, and polytetrafluoroethylene.Condensation polymer is a polymer prepared by condensation polymerization. Its structural unit is chemically different from that of monomer, such as phenolic resin, polyester resin, polyamide resin and so on.2., according to resin molecular backbone classificationAccording to this method, resins can be classified into carbon chain polymers, hetero chain polymers, and elemental organic polymers.A carbon chain polymer is a polymer composed of carbon atoms of the backbone, such as polyethylene, polystyrene, etc..A chain polymer is a polymer consisting of atoms of two or more elements, such as carbon, oxygen, nitrogen, sulfur, etc., such as POM, polyamide, polysulfone and polyether. Organic polymer refers to the main chain does not necessarily contain carbon atoms, mainly by silicon, oxygen, aluminum, titanium, boron, sulfur, phosphorus and other elements of the atoms, such as organic silicon.
Resins are made of natural resins and synthetic resins. Natural resin is an amorphous organic matter from the secretions of plants and animals in nature, such as rosin, shellac, amber, etc.. A synthetic resin is a resin product obtained by the chemical synthesis of a simple organic substance or by the chemical reaction of some natural products.
Resin usually refers to softening or melting range after heating. When softening, it tends to flow under external force. At normal temperature, it is solid, semi solid, and sometimes liquid organic polymer. Broadly speaking, any polymer that can be used as plastic material for processing raw materials is called resin.
