Explanation
It can be divided into natural resin and synthetic resin. natural resin is the normal metabolite or secretion of plant tissue, and often coexists with volatile oil in the secretory cells, resin ducts or catheter of plants, especially in the catheter of the core wood of perennial woody plants. natural resin is a mixture composed of various organic components, usually amorphous solid, and a few semi solid? Sometimes it can also be a liquid organic substance. The relative molecular weight is uncertain but usually high, with a range of bating or melting temperature, which is generally insoluble in water and soluble in organic solvents., synthetic resin is a kind of artificial macromolecule compound. It can flow, shape and curing into products within a certain temperature range. According to its different processing behavior, it can be divided into thermoplastic resin and thermosetting resin. According to the scope of use, synthetic resin is used to manufacture plastics, rubber, synthetic fiber, coatings, adhesive, insulation materials, etc. See styrene acrylonitrile copolymer (page 21) for as resin.
Classification
Organic polymer materials -> Plastics