methylene group

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Related to methylene group: methylene radical
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Noun1.methylene group - the bivalent radical CH2 derived from methane
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
References in periodicals archive ?
Therefore it is clear that the additional methylene group between the perfluoroalkyl chain and the methylenehydroxyl unit is responsible for the side reaction.
7) For this reason, a suitable reactive diluent for air-drying alkyd paints should possess an allylic methylene group as a reactive site for efficient oxidative curing.
It is simply a condensation reaction between an aldehyde or a ketone and a compound containing an active methylene group.
A wellknown catalysis mechanism includes the formation of a quinone methide intermediate and subsequent Michael type addition with the formation of a methylene group between aromatic rings [3].
Epoxy, urethane, aminoplast, unsaturated polyester, alkyd, silane/silicone, hybrid systems, active methylene group, etc.
1] which corresponds to terminal methylene group of the monomer clearly indicated the complete polymerization of vinyl group.
The determination of the methylene group distribution between chains and cycles in amorphous solids is a complicated problem and needs further research, especially the dipolar-dephasing behavior of the kerogen in the [sup.
A preferred adhesive has a first component comprising a PRF resin mixed with a methylene group donor hardener such as paraformaldehyde.
88 suggest that it is attached to a methylene group.
Of all isocyanates, only MDI as a constituent of the macromolecule is a suitable co-reactant for peroxide vulcanization; here we get radical formations through the central methylene group.
As a measure of the size of each segment, a methylene group, -[CH.

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