What is the difference between the properties of thermosetting resin and thermoplastic resin?

The difference between thermosetting resin and thermoplastic resin properties is mainly:

① Different solvent resistance. The thermoplastic resin produced by polymerization method has strong resistance to organic solvents, so most synthetic fibers can be dry cleaned, only spandex has poor solvent resistance; Thermosetting resins such as buttons, resin beads, coatings, etc. are generally not dry-cleaned. Therefore, various organic solvents, such as tetrachloroethylene, carbon tetrachloride, gasoline, acetone, banana water, etc., are generally packaged in glass bottles or iron drums, rather than plastic drums, which is because the thermosetting resin is not solvent resistant. Thermosetting resin is not solvent resistant situation is more complex, not any kind of solvent can dissolve each thermosetting resin. Laundry staff if the cleaning work time is long, it is known that alcohol has poor solubility in resin, but it can be dissolved in plexiglass, people used in the past is made of alcohol dissolved plexiglass, and now some electric car headlight glass is plexiglass, dirty with alcohol wipe, not only can not be bright, but will become more opaque, Look carefully at the surface that has been dissolved.

②Different heat resistance. Thermosetting fiber has better heat resistance than thermoplastic fiber. Once the thermosetting resin is cured, it will no longer soften or flow when heated under pressure. Thermoplastic resin has the properties of softening by heat and hardening by cooling, which can be maintained even if heating and cooling are repeated many times.

③Different uses. Thermosetting resins are mainly used in the manufacture of reinforced plastics, foam plastics, various electrical molding plastics, casting products, etc., and a considerable number of adhesives. Thermoplastic resins are widely used, and two-thirds of the plastics used in construction belong to thermoplastic resins. Synthetic fiber is an important class of thermoplastic resins.