What material is resin?

What material is resin?

    Resin usually refers to an organic polymer that has a softening or melting range after being heated. When softened, it has a tendency to flow under the action of external force. It is solid, semi-solid, or sometimes liquid at room temperature. Strictly speaking, resin is a chemical substance with a phenolic structure. There are many types. It is widely used in our light industry and heavy industry. It also often appears in our daily life, such as plastics, resin glasses, paints, and rosin.

    Resins are divided into natural resins and synthetic resins. Natural resin refers to amorphous organic substances obtained from animal and plant secretions in nature, such as rosin, amber, shellac, etc. Synthetic resin refers to a resin product obtained by chemical synthesis of simple organic matter or chemical reaction of certain natural products.

     Classification of resin

     ・Natural resin

     Rosin | natural resin

     ・Synthetic resins Epoxy resin│ Phenolic resin│ Acrylic resin│ Unsaturated polyester resin│ Ion exchange resin│ Amino resin│ Silicone resin│ Polyamide resin│ Urea-formaldehyde resin│ Polyurethane resin│ Furan resin│ Other synthetic resins

             1. Classification by resin synthesis reaction

     According to this method, the resin can be divided into addition polymers and condensation polymers. Addition polymers refer to polymers produced by addition polymerization. The chemical formula of their chain link structure is the same as the molecular formula of the monomer, such as polyethylene, polystyrene, polytetrafluoroethylene, etc.

Condensation polymer refers to a polymer made by condensation polymerization reaction, the chemical formula of its structural unit is different from the molecular formula of the monomer, such as phenolic resin, polyester resin, polyamide resin, etc.

             2. Classification according to the main chain composition of resin molecules

     According to this method, resins can be divided into carbon chain polymers, heterochain polymers and elemental organic polymers.

     Carbon chain polymers refer to polymers whose main chain is composed entirely of carbon atoms, such as polyethylene, polystyrene, etc.

     Heterochain polymers refer to polymers whose main chain is composed of atoms of two or more elements such as carbon and oxygen, nitrogen, and sulfur, such as polyformaldehyde, polyamide, polysulfone, polyether, etc.

     Elemental organic polymers do not necessarily contain carbon atoms in the main chain, but are mainly composed of atoms of silicon, oxygen, aluminum, titanium, boron, sulfur, phosphorus and other elements, such as organic silicon.