polystyrene material

2. MATERIALS FOR PRODUCTION OF
POLYSTYRENE
 BASIC STUFF FOR PRODUCTION OF MATERIALS FROM PLASTIC IS OIL.
 MATERIALS FOR PRODUCTION OF STYRENE:
 *BENZENE
 *ETHYLENE

3. HISTORY
 POLYSTYRENE WAS DISCOVERED IN 1839 BY EDUARD
SIMON,AN APOTHECARY FROM BERLIN
 From storax, the resin of the Turkish sweetgum
treeLiquidambar orientalis, he distilled an oily substance,
a monomer that he named styrol.
 In 1866 Marcelin Berthelot correctly identified the formation
of metastyrol/Styroloxyd from styrol as
a polymerization process.
 The crystal structure of isotactic polystyrene was reported
by Giulio Natta.

4.  In 1954, the Koppers Company in Pittsburgh,
Pennsylvania, developed expanded polystyrene (EPS)
foam under the trade name Dylite.
 In 1960, Dart Container, the largest manufacturer of
foam cups, shipped their first order.
 In 1988, the first U.S. ban of general polystyrene
foam was enacted in Berkeley, California.

5. PRODUCTION OF POLYSTYRENE
 POLYSTYRENE IS PREPARED BY POLYMYSERATION OF STYRENE
 IT CAN BE REALISED BY VARIOUS TECHNIQUES:
SOLUTION POLYMERISATION
BLOCK POLYMERISATION
EMULSION POLYMERISATION
SUSPENSION POLYMERISATION

6. AREAS OF EXPLOITATION OF
POLYSTYRENE
 BUILDING INDUSTRY
 INSULANT CONTAINER
 FINISHING PRODUCTS
 GAMES,MODELLING,DECORATION
 TECHNICAL PRODUCTS
 TRAFFIC AND STORE RESOURCES
 PACKING MATERIALS
 PACKAGING RESOURCES
 DIMENSION TIMBER

7. PHYSICAL PROPERTIES
Polystyrene has good thermal and electrical insulation properties
Density of EPS 16–640 kg/m3[15]
Young's modulus (E) 3000–3600 MPa
Tensile strength (st) 46–60 MPa
Elongation at break 3–4%
Notch test 2–5 kJ/m2
Glass transition temperature 100 °C[16]
Vicat B 90 °C[17]
Linear expansion coefficient (a) 8×10−5 /K
Specific heat (c) 1.3 kJ/(kg·K)
Water absorption (ASTM) 0.03–0.1
Decomposition X years, still decaying

8. CHEMICAL PROPERTIES
 Polystyrene is chemically inert, and does not react
with most substances.
 The transformation of carbon-carbon double bonds
into less reactive single bonds in polystyrene, is the
main reason for its chemical stability. Most of the
chemical properties of polystyrene are as a result of
the unique properties of carbon.

9.  It dissolves in some organic solvents. It is soluble
in solvents that contain acetone, such as most
aerosol paint sprays and cyanoacrylate glues.
 It is highly flammable and burns with an orange
yellow flame, giving off carbon particles or soot,
as a characteristic of all aromatic hydrocarbons.
Polystyrene, on complete oxidation, produces
only carbon dioxide and water vapour.

10. THANK YOU