Explanation
It refers to the plastic parts that become soft when heated during processing and have different mechanical properties that can harden after cooling. A kind of synthetic resin that can be melted and dissolved repeatedly by changing the temperature. Most of these polymer have linear chain structure and can be prepared by free radical, ionic, coordination and other polymerization reactions, as well as solution, lotion, suspension polymerization and other methods. The most common plastics in industry are resin such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and thermoplastic elastomers in rubber. Such as polystyrene polybutadiene polystyrene 5 block copolymer. There is no chemical crosslinking between macromolecule of thermoplastic resin, only physical crosslinking exists. Therefore, thermoplastic resin is easy to add_ The advantages of work. There are also drawbacks to poor heat resistance.
Classification
Organic polymer materials -> Plastics