POLYSTYRENE-(C8H8)n

MATERIALS FOR PRODUCTION OF POLYSTYRENE

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

HISTORY POLYSTYRENE WAS DISCOVERED IN 1839 BY

EDUARD SIMON,AN APOTHECARY FROM BERLIN From storax, the resin of the Turkish sweetgum tree

Liquidambar 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.

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.

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

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

PHYSICAL PROPERTIESPolystyrene has good thermal and electrical insulation properties

Density of EPS 16–640 kg/m3[15]

Young's modulus (E) 3000–3600 MPaTensile strength (st) 46–60 MPaElongation 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 /KSpecific heat (c) 1.3 kJ/(kg·K)

Water absorption (ASTM) 0.03–0.1

Decomposition X years, still decaying

 

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. 

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.

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