diolefin


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diolefin

[dī′ō·lə‚fən]
(organic chemistry)
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% or 80 bromine number of naphtha) and diolefins (e.g., 3.2 vol % or 10 diene number of naphtha); high aromatics (e.g., 57.7 wt % in LGO); and, therefore, a low cetane number (29 CN) of LGO.
Using a suitable amount of the fluorinated diolefin, the iodine functionality of the elastomeric segment A can be increased to two or more than two.
Early studies by Enichem of diolefin polymerization using Ziegler-Natta catalyst systems based on rare earth elements (ref.
Fuel Type RQ (= C[O.sub.2]/ Range of RQ [O.sub.2,st]) relation Paraffins, 1/{1 + (1/2 + 1/2h)} 1/2 < RQ < (2/3) [C.sub.n] [H.sub.2n+2] Diolefins, 1/{1 + (1/2 - 1/2n)} 2/3 < RQ < (4/5) [C.sub.n] n [greater than or equal to] 2 [H.sub.2n+2] Aromatics, 1/{(3/2 - 3/2n)}, 2/3 < RQ < (4/5) [C.sub.n] n [greater than or equal to] 6 [H.sub.2n-6] Olefins, (2/3) (2/3) * naphthenes, or cycloparaffin, [C.sub.n] [H.sub.2n] Alcohols, (2/3) (2/3) * [C.sub.n] [Th.sub.2n+2]O Fuel Type Remarks Paraffins, RQ increases slightly with "n"; RQ = 1/2 for [C.sub.n] C[H.sub.4], RQ incresaes with n and RQ [right [H.sub.2n+2] arrow] (2/3) as n [right arrow] [infinity].
Triaryl Diolefins as Hosts for Metals and Organoiodides.
The typical pyrolysis pattern of polyethylene (C 85.7%, H 14.3%) was not encountered because the samples for analysis were not burned (there was no presence of olefins and diolefins with every n-alkane, and there was an absence of the branched alkanes between the n-alkanes).
Diolefins have been shown to polymerize under certain conditions in the solid state.
Besides the hydrogenation of dienes, ethyl and propyl mercaptans are also removed via thioetherification where the diolefins react with the mercaptans to form olefinic sulfides which are higher boiling and concentrate at the bottom of the tower.
Internal cyclization is also thought to occur during the acid-catalyzed polymerization of linear C5 diolefins (ref.
These chemical agents are radiation sensitive monomers (acrylates, hydrocarbon olefins and diolefins) that, apart from accelerating the rate of monomer consumption, also protect the treated polymer from degradation.