1 / 12

Polystyrene

Polystyrene. Uses. Packing Insulation Food containers Disposable Cutlery Electronic Casings Toys Piping. How it’s made. Formed from monomers of Styrene Polymerization initiated by heat or catalysts. Structure. Atactic Referred to as “Regular” Polystyrene Syndiotactic

alman
Download Presentation

Polystyrene

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Polystyrene

  2. Uses • Packing • Insulation • Food containers • Disposable Cutlery • Electronic Casings • Toys • Piping

  3. How it’s made • Formed from monomers of Styrene • Polymerization initiated by heat or catalysts

  4. Structure • Atactic • Referred to as “Regular” Polystyrene • Syndiotactic • More highly ordered structure gives this form a higher melting point • Isotactic • Not produced commercially

  5. Syndiotactic and Atactic PS

  6. Properties • Pure Polystyrene is a colorless, hard, brittle plastic • Polystyrene is a Thermoplastic • Melts to liquid when heated • Freezes to brittle glassy state when cooled • This property allows for PS to be molded and extruded

  7. Properties

  8. Types of Polystyrene • Solid Foam • Expanded Polystyrene • Extruded Foam • Styrofoam • Copolymers • High Impact Polystyrene

  9. Solid Foam • Also called expanded polystyrene (EPS) • Most commonly used form of PS • Produced by mixing PS with gaseous blowing agent (CO2) • Used for • Disposable coffee cups • Packaging • Insulation

  10. Extruded Foam • Known commercially as “Styrofoam” • Produced by PS pellets being fed through an extruder with additives and a blowing agent • Higher structural strength than solid foam • Used for • Building construction (insulator) • Foam plates and trays • “Clam shells”

  11. Copolymers • High impact Polystyrene (HIPS) • PS mixed with polybutadiene rubber • Mixing gives PS more flexibility • Two phase polymer- “graft polymer” • Used for • Toys • Product castings

  12. Questions?

More Related