PS – Polystyrene Crystal
Crystal polystyrene is the cheapest thermoplastic available. It has properties to match its price. It is transparent and has good optical properties. It has very low Impact Strength.
Applications: Household Goods, Containers, Furniture, Housings and Packaging.
| Tensile Strength | Flexural Modulus | Impact Strength | Max Temp. | Chemical Resistance |
|---|---|---|---|---|
| 5000-7500 psi | 380,000 -480,000 psi | .35-.45 ft-lb/in notched izod | 100°-150° F | Poor |
Advantages
- Optical Clarity
- High gloss
- FDA grades available
- Low cost
- Good dimensional stability
- Good rigidity
Disadvantages
- Flammable, but flame retardant grades available
- Poor solvent resistance
- Homopolymers are brittle
- Subject to stress and environmental cracking
Brand Names: Certene, Hival, Polystyrol, Styron.