styrene


styrene
/stuy"reen, stear"een/, n. Chem.
a colorless, water-insoluble liquid, C8H8, having a penetrating aromatic odor, usually prepared from ethylene and benzene or ethylbenzene, that polymerizes to a clear transparent material and copolymerizes with other materials to form synthetic rubbers. Also called cinnamene, phenylethylene, vinylbenzene. Cf. polystyrene.
[1880-85; styr- (shortened s. of STYRAX) + -ENE]

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      liquid hydrocarbon that belongs to the family of aromatic organic compounds and is important chiefly for its marked tendency to undergo polymerization. Styrene is used in the manufacture of plastics, resins, and rubbers, which are composed of very large molecules (polymers) formed by combination of smaller ones (monomers). It is also used to make polyesters and latex paints.

      Pure styrene is clear, colourless, flammable, and slightly toxic; it boils at 145° C (293° F) and freezes at -30.6° C (-23.1° F). Its molecular formula is C8H8. Its isolation from storax (a natural balsam) and its polymerization were reported before 1850, but its industrial manufacture and utilization were not begun until the late 1930s. It is produced by dehydrogenation of ethylbenzene, most of which is made from ethylene and benzene, both derived from petroleum. Production increased rapidly during World War II because of the importance of styrene as a component of synthetic rubbers; by the late 20th century, more than 9,000,000 metric tons per year were being made.

      Free-radical catalysts cause the rapid conversion of styrene into polystyrene (q.v.), a plastic widely used in molded or extruded articles. The synthetic rubber called SBR, GR-S, or Buna S is made from mixtures of styrene and butadiene, which react to form a copolymer, the molecules of which contain units of both compounds. Several other monomers (e.g., acrylonitrile) may be copolymerized with styrene to produce useful plastics or resins with qualities superior to that of polystyrene.

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Universalium. 2010.

Look at other dictionaries:

  • Styrene — Preferred IUPAC n …   Wikipedia

  • Styrene — Styrène Styrène Général Synonymes Phényléthylène Vinyl benzène Cinnamène Styrol No CAS …   Wikipédia en Français

  • Styrène — Général Synonymes Phényléthylène Vinyl benzène Cinnamène Styrol No CAS …   Wikipédia en Français

  • styrène — [ stirɛn ] ou styrolène [ stirɔlɛn ] n. m. • 1936, 1867; de styrax ♦ Chim. Hydrocarbure benzénique (C6H5CH=CH2), entrant dans la composition de nombreuses matières plastiques. ⇒ polystyrène. « Le styrène autrefois s extrayait du benjoin Provenant …   Encyclopédie Universelle

  • styrene — colorless hydrocarbon, 1885, from Styrax, name of a genus of trees (the chemical is found in their resin), 1786, from L. styrax, from Gk. styrax, of Sem. origin (Cf. Heb. tsori terebinth resin ). Form influenced by Gk. styrax shaft of a lance …   Etymology dictionary

  • styrene — ► NOUN Chemistry ▪ an unsaturated liquid hydrocarbon obtained as a petroleum by product and used to make plastics and resins. ORIGIN from styrax, a gum resin …   English terms dictionary

  • styrene — [stī′rēn΄, stir′ēn΄] n. [< L styrax (see STORAX) + ENE] a colorless or yellowish, easily polymerized, aromatic liquid, C6H5CH:CH2, used in organic synthesis, esp. in manufacturing synthetic rubber and plastics …   English World dictionary

  • styrene — poly·styrene; styrene; …   English syllables

  • styrene — Styrolene Sty ro*lene, n. (Chem.) An unsaturated hydrocarbon, {C8H8}, obtained by the distillation of storax, by the decomposition of cinnamic acid, and by the condensation of acetylene, as a fragrant, aromatic, mobile liquid; called also {phenyl …   The Collaborative International Dictionary of English

  • styrene — noun Etymology: International Scientific Vocabulary, from Latin styrax Date: 1885 a fragrant liquid unsaturated hydrocarbon C8H8 used chiefly in making synthetic rubber, resins, and plastics and in improving drying oils; also any of various… …   New Collegiate Dictionary


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