“monomer”的意思、由来-百科全书

monomer

chemical compound

a molecule of any of a class of compounds, mostly organic, that can react with other molecules of the same or other compound to form very large molecules, or polymers. The essential feature of a monomer is polyfunctionality, the capacity to form chemical bonds to at least two other monomer molecules. Bifunctional monomers can form only linear, chainlike polymers, but monomers of higher functionality yield cross-linked, network polymeric products.

Addition reactions are characteristic of monomers that contain either a double bond between two atoms or a ring of from three to seven atoms; examples include styrene, caprolactam (which forms nylon-6), and butadiene and acrylonitrile (which copolymerize to form the synthetic rubber Buna N). Condensation polymerizations are typical of monomers containing two or more reactive atomic groupings; e.g., a compound that is both an alcohol and an acid can undergo repetitive ester formation involving the alcohol group of each molecule with the acid group of the next, to form a long-chain polyester. Similarly, hexamethylenediamine, which contains two amine groups, condenses with adipic acid, which contains two acid groups, to form the polymer nylon-6,6.

词条	monomer
释义	monomer chemical compound a molecule of any of a class of compounds, mostly organic, that can react with other molecules of the same or other compound to form very large molecules, or polymers. The essential feature of a monomer is polyfunctionality, the capacity to form chemical bonds to at least two other monomer molecules. Bifunctional monomers can form only linear, chainlike polymers, but monomers of higher functionality yield cross-linked, network polymeric products. Addition reactions are characteristic of monomers that contain either a double bond between two atoms or a ring of from three to seven atoms; examples include styrene, caprolactam (which forms nylon-6), and butadiene and acrylonitrile (which copolymerize to form the synthetic rubber Buna N). Condensation polymerizations are typical of monomers containing two or more reactive atomic groupings; e.g., a compound that is both an alcohol and an acid can undergo repetitive ester formation involving the alcohol group of each molecule with the acid group of the next, to form a long-chain polyester. Similarly, hexamethylenediamine, which contains two amine groups, condenses with adipic acid, which contains two acid groups, to form the polymer nylon-6,6.
随便看	Sir Joseph, Baronet Whitworth Sir Joseph Cook Sir Joseph Dalton Hooker Sir Joseph Larmor Sir Joseph Norman Lockyer Sir Joseph Paxton Sir Joseph Rotblat Sir Joseph Ward Sir Joseph Whitworth, Baronet Sir Joseph William Bazalgette Sir Joseph Wilson Swan Sir Joshua Reynolds Sir Josiah, 1st Baronet Child Sir Josiah Child, 1st Baronet Sir Julian Huxley Sir Julius Vogel Sir Karl Popper Sirk, Douglas Sir Keith Jacka Holyoake Sir Keith Macpherson; and Smith, Sir Ross Macpherson Smith Sir Keith Macpherson; and Smith Smith, Sir Ross Macpherson Sir Keith Sinclair Sir Kenelm Digby Sir Kenneth MacMillan Sir Kingsley Amis