(6) Despite the high DC achieved in dental resins, complete conversion of aliphatic carbon-carbon double bonds
is typically not achieved.
During metathesis, molecules that contain carbon-carbon double bonds
swap groupings of atoms.
Ceramides (sphingolipids) are molecules having: a sphingoid amidic base (14-22), and are mostly decorated with hydroxyl functions and carbon-carbon double bond
(s), attached to a long chain fatty acid (14-30 carbon atoms), which may saturated or unsaturated .
The carbon-carbon double bond
in MAPTMS is reactive toward free-radical polymerization, and the Si-OR groups can be hydrolyzed leading, in principle, to better interactions with siloxane chains.
A rubber composition comprising: (A) a conjugated diene rubber which is obtained by polymerizing a conjugated diene compound or polymerizing a conjugated diene compound and an aromatic vinyl compound and has a group having an active hydrogen and a group capable of chemically binding to a silica, (B) a silica, (C) a silane coupling agent (1) capable of reacting with a carbon-carbon double bond
of the conjugated diene in the conjugated diene rubber, and (D) a silane coupling agent (II) capable of reacting with the group having an active hydrogen; a method for producing a rubber composition, which comprises mixing the above-mentioned composition; and a tire which is obtained by crosslinking and molding the rubber composition obtained by the method for production.
[C = C] : concentration of carbon-carbon double bond
The term "omega-3" refers to the molecular structure of these fats, indicating the presence of a carbon-carbon double bond
on the third carbon from the end of the molecule.
Another story looks at the potential replacement of one of butyl rubber's carbon-carbon double bonds
with a phosphorus-carbon double bond, allowing for chemical transformation of this rubber polymer.
The Wittig olefination [1-5], for which Wittig was awarded the Nobel prize in chemistry in 1979, is a powerful method for the formation of carbon-carbon double bonds
by the reaction of aldehydes, or ketones, with phosphoranes (Wittig reagents).
Indeed, the oxidation competitively occurs on the carbon-carbon double bonds
and the epoxy groups in ENR raw rubber.
It corresponds to the [sp.sup.2] hybridization of carbon, suggesting that both S1 and S4 contain carbon-carbon double bonds
. For S1, two additional peaks at 14.3 ppm and 62.8 ppm are related to -C[H.sub.3] and sp hybridization of carbon, respectively .
CCP Composites US LLC has been granted a patent for a thermosetting, crosslinkable resin composition suitable for preparing a gel coat, the composition is comprised of: a polyester acrylic polymer having an average of more than two polymerizable carbon-carbon double bonds
in each molecule, the carbon-carbon double bonds
in the polyester acrylic polymer being from a reaction product of a saturated polyacid half-ester having an average acid functionality of two or more and an unsaturated epoxide monomer in about chemically equivalent amounts to furnish one epoxy group per carboxyl group, the saturated polyacid half-ester being the reaction product of one or more polyols having an average of at least two hydroxy!