What constitutes resin?

There are two classifications of resins: synthetic reaction classification and molecular backbone classification.

First, according to the resin synthesis reaction classification:

1. Additive polymer: This type of resin refers to a polymer obtained by addition polymerization. The chemical structure of the chain structure is the same as that of the monomer, such as polyethylene, polystyrene, polytetrafluoroethylene, etc.

2. Polycondensate: This type of resin refers to a polymer obtained by condensation polymerization, and the chemical formula of the structural unit is different from that of the monomer, such as a phenol resin, a polyester resin, a polyamide resin, etc.

Second, according to the composition of the resin molecular backbone:

1. Carbon chain polymer: This type of resin refers to a polymer whose main chain is composed entirely of carbon atoms, such as polyethylene, polystyrene, and the like.

2. Hetero-chain polymers: The type of resin refers to a polymer composed of atoms of two or more elements of carbon and oxygen, nitrogen, sulfur, and the like, such as polyoxymethylene, polyamide, polysulfone, polyether, etc.

3. Elemental organic polymer: This type of resin means that the main chain does not have a content of carbon atoms, and is mainly composed of atoms of elements such as silicon, oxygen, aluminum, titanium, boron, sulfur, phosphorus, etc., like silicone.

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