| 释义 |
telomer Chem.|ˈtɛləʊmə(r)|
[f. telo-1 + -mer.]
A low-molecular-weight polymer consisting of a chain of a limited number of units (taxogens) terminated at each end by a radical from a different compound (the telogen).
1948Hanford & Joyce U.S. Patent 2,440,800 1 It has been found necessary to coin new terms to describe the reaction and the participants therein... ‘Telomerization’ is defined as the process of reacting..a molecule YZ which is called a ‘telogen’ with more than one unit of a polymerizable compound..called a ‘taxogen’ to form products called ‘telomers’ having the formula Y(A)nZ. 1951Jrnl. Amer. Chem. Soc. LXXIII. 5197/1 When it [sc. the polymerization] is conducted in the presence of any one of a wide variety of organic compounds, telomers containing 1–25 tetrafluoroethylene units combined with one molecule of the chain transfer compound are obtained. 1966J. A. Brydson Plastics Materials xv. 295 With an ethylene-carbon tetrachloride ratio of about 4:1 about 60% of the telomers have 7, 9 or 11 carbon atoms in the molecule. 1980[see taxogen].
So ˌtelomeriˈzation, polymerization that is limited by the action of a telogen; also ˈtelomerized ppl. a., ˈtelomerizing vbl. n.
1948Telomerization [see telomer]. 1954Jrnl. Res. Nat. Bureau Standards (U.S.) LIII. 122 YZ + nCX2= CX2→ Y(CX2CX2)nZ... Such a reaction is called telomerization. 1967Gloss. Terms Plastics Industry (B.S.I.) i. 7 Telomerized polymer, a polymer chain-stopped by a telomer. 1968G. Trappe in P. D. Ritchie Vinyl & Allied Polymers xii. 265 Low molecular weight oils, greases, and waxes of polychlorotrifluoroethylene are made by polymerisation in the presence of telomerising agents such as carbon tetrachloride. 1974H. I. Bolker Natural & Synthetic Polymers iii. 136 About 0·5–1·0 mole % of acetic acid is added as a telomerization agent.., which limits the formation of chains of excessively high molecular weight. |