Tells about PSU materials and performance uses

1. PSU is an amorphous polymer with a Tg of 190 ° C and a molding temperature of 280 ° C or higher. The product is transparent. The molding characteristics of PSU are similar to those of PC. The fluidity of the melt is close to that of Newtonian fluid. More sensitive. When the melt temperature exceeds 330 ° C, the melt decreases by 50% for every 30 ° C increase.

2. Although the melt viscosity of PSU is sensitive to temperature, its viscosity is still high, the fluidity during molding is poor, and the melt cooling rate is fast, and the molecular chain is rigid, so the internal stress generated during molding is difficult to eliminate. .

3. It is obvious that there is no clear water gene in the molecular structure of PSU, the water absorption is small, and the equilibrium water absorption is 0.6%. However, in the molding process, the presence of trace moisture will cause melt degradation due to high temperature and strong mechanical force, so Drying must be done before injection molding. Excessive rates can cause melt fracture in the PSU melt, limiting the rate of filling, which makes mold filling difficult.

4, self-extinguishing, can be used at -100-175 degrees for a long time, PSU is resistant to the corrosion of inorganic acid and alkali salts, but not resistant to aromatic hydrocarbons and halogenated hydrocarbons, the glass fiber reinforced modification can make the material wear resistance greatly Improve, polysulfone and ABS, polyimide, polyether ether ketone and fluoroplastics can be made into polysulfone modified products, mainly to improve their impact and elongation, solvent resistance, environmental resistance, processing Performance and platability.