Polystyrene (PS) is an inexpensive and hard polymer that is used extensively.
Not required unless stored improperly. If drying is needed, the recommended conditions are 2-3 hours at 80 C [176 F].
180 C 280 C [356 F 536 F]; upper limit is 250 C for flame retardant grades [19 158 F]
Suggested: 20 C 70 C [68 F 158 F]
20 60 MPa
Fast speeds are recommended.
All types of conventional gates can be used.
The polymerization of styrene produces general-purpose PS. Most commercial grades are clear, amorphous polymers. PS offers excellent dimensional and thermal stability, optical clarity, and little tendency to absorb moisture. It has good dielectric properties. It is resistant to water and dilute inorganic acids. Strong oxidizing acids, such as concentrated sulfuric acid, attack it, and some organic solvents swell it.
Processing shrinkage is typically between 0.4 0.7%.