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olefin |
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olefin (ō`ləfĭn) or olefin series: see alkene alkene (ăl`kēn), any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon double bonds (see ..... Click the link for more information. . olefinor alkeneAny unsaturated hydrocarbon containing one or more pairs of carbon atoms linked by a double bond (see covalent bond, saturation). Olefins may be classified by whether the double bond is in a ring (cyclic) or a chain (acyclic, or aliphatic) or by the number of double bonds (monoolefin, diolefin, etc.). Rare in nature, olefins are obtained by the cracking of petroleum fractions at high temperatures. The simplest ones (ethylene, propylene, butylene, butadiene, and isoprene) are the basis of the petrochemicals industry. They react by adding other chemical agents at the double bond to form derivatives or polymers. |
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| 54) and lower birefringence than other COCs and cyclic olefins, suiting it to uses in shrink film, optical lenses for DVD players and recorders, and pharmaceutical blister packs. The joint venture will be named Nova Innovene, after its shareholders Nova Chemicals and Innovene, BP's newly formed olefins and derivatives business. The two-year collaboration will include BP's newly formed olefins and derivatives (O&D) petrochemical subsidiary. |
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