PSU polysulfone is a transparent solid material of amber with a density of 1.25-1.35g / cm, high hardness and impact strength, good resistance to steam, hydrolysis, radiation, heat and aging resistance, good dimensional stability.
1, PSU is a non-crystalline polymer, Tg190 ° C, forming temperature above 280 ° C, the product was transparent, PSU forming characteristics similar to PC, the melt flow close Newtonian fluid, the polymer melt viscosity is more sensitive to temperature When the melt temperature exceeds 330 ° C, the melt degree drops by 50% for every 30 ° C increase.
2, Although the viscosity of PSU is sensitive to temperature, the viscosity of PSU is still high, the flowability is poor during the forming process, and the cooling speed of the melt is relatively fast and the molecular chain is rigid. Therefore, the internal stress generated in the molding is hard to be eliminated.
3, Obviously PSU hair molecule structure without water gene, water absorption is small, the balance of water absorption of 0.6% but in the molding process, the presence of trace moisture, due to high temperature and strong mechanical effects lead to melt degradation, so before injection Must be dried.High ** rate will melt the PSU melt appears, limiting the filling rate, resulting in filling difficulties.
4, Self-extinguishing, long-term use at -100-175 degrees, PSU resistant to corrosion of inorganic acid and alkali salts, but not resistant to aromatic hydrocarbons and halogenated hydrocarbons, glass fiber reinforced modified material can greatly improve the wear resistance, Polysulfone and ABS, polyimide, polyether ether ketone and fluorine plastic can be made of polysulfone modified products, mainly to improve its impact and elongation, solvent resistance, environmental resistance, processing performance and Plating capacity.