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an olefin that contains two carbon-to-carbon double bonds in its molecules
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(daɪˈoʊ lə fɪn)

an aliphatic compound, as 1,3-butadiene, CH2=CH−CH=CH2, that contains two double bonds.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
developed A/B block copolymers where A is the traditional synthetic vinyl, acrylic, diolefin, nitrile, or acrylonitrile monomer while B is a radically polymerizable plant oil monomer based on triglycerides from bio-feedstocks such as soybean oil.
Monomer A is a vinyl, acrylic, diolefin, nitrile, dinitrile, acrylonitrile monomer, a monomer with reactive functionality, or a cross-linking monomer.
The epoxidation of diolefin polymers is a subject of increasing interest in recent years, because it can not only keep the original performance, but also give excellent properties with the introduction of new group in molecular chain.
The substituent chain present in Anacardic acid, cardol and cardanol is not a homogeneous, diolefin but is a mixture of olefins of different degree of unsaturation.
The UE-1 project will eliminate the mixed-phase by splitting the diolefin reactor product into light and heavy fractions, and charging them separately into the following two main reactors.
The subject invention further reveals a rubbery composition which is comprised of the reaction product of (I) a rubbery polymer having repeat units which are comprised of (1) an olefin monomer selected from the group consisting of conjugated diolefin monomers and monoolefm monomers and (2) a conjugated triene monomer and (II) a dieno phile and/or dienophile which is functionalized with a group which is capable of reacting with a filler selected from the group consisting of carbon black, silica, starch, and cellulose.
The aim of this project is to study alternative routes to existing diolefins and to prepare novel diolefin ligands.
Each unit has two consecutive reactors: the diolefin reactor and the main reactor.
Key statement: A conjugated diolefin copolymer robber is produced by copolymerization of a conjugated diolefin and an aromatic vinyl compound and has a primary amino group and an alkoxysilyl group bonded to the copolymer chain.
Key statement: A heterogeneous rubbery polymer is provided that includes a polymer chain derived from a vinyl aromatic monomer anda conjugated diolefin monomer, wherein from greater than 20 weight percent to about 40 weight percent of units in the rubbery polymer are derived from the vinyl aromatic monomer and from about 60 weight percent to about 80 weight percent of units in the rubbery polymer are derived from the conjugated diolefin monomer.
As an example, in figure 3, the MWD of a copolymer produced with the branching and pseudo-living technology is compared with the MWD of the same polymer obtained in absence of the fluorinated diolefin. It appears that while the high molecular weight region is deeply modified by the diene, the low molecular weight region is mainly determined by the pseudo-living mechanism.