functional group


Also found in: Thesaurus, Medical, Legal, Acronyms, Encyclopedia, Wikipedia.
Related to functional group: Homologous series

functional group

n.
An atom or group of atoms, such as a carboxyl group, in an organic compound that defines the structure of a family of compounds and determines the properties of the family.

functional group

n
(Chemistry) chem the group of atoms in a compound, such as the hydroxyl group in an alcohol, that determines the chemical behaviour of the compound

func′tional group`


n.
a group of atoms responsible for the characteristic behavior of the class of compounds in which the group occurs, as the hydroxyl group in alcohols.
[1935–40]

functional group

The atom (or group of atoms) present in a molecule which determines the characteristic properties of that molecule.
Translations
References in periodicals archive ?
Because data did not meet the assumptions necessary for repeated-measures ANOVA (compound symmetry and sphericity), the individualistic responses of each functional group were analyzed using a two-way MANOVA for each community type.
Key statement: The present invention is directed to a rubber composition comprising: a functionalized elastomer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and a functional group bonded to the backbone chain, the functional group comprising a multidentate ligand capable of complexing with a metal ion; and a metal ion.
The Compendium of Organic Synthetic Methods series facilitates the working chemist's search for the most useful functional group transformations in organic chemistry.
Key statement: A method for producing a rubber composition includes kneading: a rubber component comprising a conjugated diene polymer having at least one functional group selected from the group consisting of a thiol group, an oxetane group and a hydro-carbylthio group; silica particles; and a catalyst for condensing silanol to form an aggregate of the silica particles.
Key statement: A tire prepared by using a rubber composition compounded with a modified conjugated diene base polymer obtained by reacting an active site of a conjugated diene base polymer with a hydrocarbyloxysilane compound which may have a functional group to introduce a functional group having high affinity with precipitated silica and precipitated silica in which a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) ([m.
PPG Industries has received a patent for a compound that is comprised of the reaction product of a highly branched polymer having terminal amine functional groups and a lactam, wherein the highly branched polymer is the step-growth polymerization reaction product of a polyfunctional first monomer having a first functional group and a polyfunctional second monomer having a second functional group wherein the first and second functional groups will react with each other but not themselves, wherein formation of the highly branched polymer is free of self-condensation of the polyfunctional first monomer, and free of self-condensation of the polyfunctional second monomer.
An enzyme is a large polymer that first grabs a reactant, puts it in contact with a reactive functional group, and then releases the final product.
Key statement: The present invention is directed to a rubber composition comprising: a functionalized elastomer comprising a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and a functional group bonded to the backbone chain, the functional group comprising a multidentate ligand capable of complexing with a metal ion; and an encapsulated metal salt.
Key statement: A subject-matter of the present invention is a rubber composition intended for the manufacture of tires or of tire semi-finished products, based on at least one isoprene elastomer, an inorganic filler as reinforcing filler and a polyfunctional organosiloxane coupling agent capable of providing the bonding between the reinforcing inorganic filler and the isoprene elastomer, comprising per molecule, grafted to its silicon atoms, on the one hand at least one hydroxyl or hydrolysable functional group allowing it to be grafted to the reinforcing inorganic filler and, on the other hand, at least one group bearing at least one azodicarbonyl functional group--CO-N= N--CO--allowing it to be grafted to the isoprene elastomer.
Component A being at least one polymer having a molecular weight (Mn) of at least 800 that has at least one functional group polymerizable by irradiation with ultraviolet (UV) light or with electron beams and has at least one functional group selected from the group consisting of isocyanate groups and epoxy groups; capable of reacting with a compound having at least one acidic hydrogen atom, component B being at least one compound having a molecular weight (Mn) of 100-8000 which has at least two functional groups polymerizable by irradiation with UV light or with electron beams; and component D being a compound having at least two acidic hydrogen atoms, wherein component A, component B and component D are each a different compound.

Full browser ?