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


  • Optical Clarity
  • High gloss
  • FDA grades available
  • Low cost
  • Good dimensional stability
  • Good rigidity


  • Flammable, but flame retardant grades available
  • Poor solvent resistance
  • Homopolymers are brittle
  • Subject to stress and environmental cracking

Brand Names: Certene, Hival, Polystyrol, Styron.