Resins generally refer to organic polymers that soften or melt upon heating, exhibit a tendency to flow under external force when softened, and are in a solid or semi-solid state at room temperature, sometimes also in a liquid form. In a broad sense, any high molecular compound that can be used as a raw material for plastic processing is called a resin.
There are natural resins and synthetic resins. Natural resins refer to amorphous organic substances obtained from secretions of animals and plants in nature, such as amber and shellac. Synthetic resins are those obtained through chemical synthesis of simple organic compounds or through chemical reactions of certain natural products, such as phenolic resins and polyvinyl chloride resins, with synthetic resins being the main component of plastics.
By synthetic reaction
This method allows resins to be categorized into addition polymers and condensation polymers. Addition polymers are polymers obtained through addition polymerization reactions, with the chemical formula of their chain segments identical to that of the monomers, such as polyethylene, etc.
Condensate polymers are those obtained from condensation polymerization reactions, whose structural unit chemical formulas differ from the monomer molecular formulas, such as phenolic aldehyde resins, polyamide resins, etc.
By the composition of the main molecular chain
By this method, resins can be classified into carbon chain polymers, hetero-chain polymers, and element organics polymers.
Carbon chain polymers refer to polymers whose main chains are entirely composed of carbon atoms, such as polyethylene.
A random copolymer refers to a polymer whose main chain is composed of atoms of two or more elements such as carbon, oxygen, nitrogen, and sulfur, such as polyformaldehyde, polyamide, polysulfone, polyether, etc.
Element organic polymers refer to polymers where the main chain does not necessarily contain carbon atoms, primarily composed of atoms of elements such as silicon, oxygen, aluminum, titanium, boron, sulfur, and phosphorus, such as organosilicon.
As nature
Thermosetting resins (commonly used in glass fiber reinforced plastics): Unsaturated polyester/vinylester/epoxy/phenolic/bis-maleimide (BMI)/polyimide resins, etc.
Thermoplastic resins: Polypropylene (PP), Polycarbonate (PC), Nylon (NYLON), Polyether Ether Ketone (PEEK), Polyether Sulfone (PES), etc.
Synthetic resins are a type of high polymer produced artificially. Their primary application is in the production of plastics. To facilitate processing and improve performance, additives are often added, and they are sometimes used directly for forming, making them synonymous with plastics. Synthetic resins are also the basic raw materials for manufacturing synthetic fibers, coatings, adhesives, insulating materials, and more. There are many types of synthetic resins, with polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), and ABS resin being the five major general-purpose resins, widely used synthetic resin materials.
Resin crafts
This set of craft items utilizes resin materials, fully capitalizing on the advantages of the material for its smooth lines and lustrous texture.