| 单词 | straight chain |
| 释义 | > as lemmasstraight chain straight chain n. Chemistry a chain of atoms that is neither branched nor closed in on itself to form a ring; usually attributive (with hyphen). ΘΚΠ the world > matter > chemistry > chemical structure or stereochemistry > [noun] > chain of atoms > types side chain1873 branched chain1889 straight chain1890 open chain1928 short chain1940 1890 J. B. Tingle tr. E. Hjelt Princ Gen. Org. Chem. i. ii. 18 If the carbon atoms of a nucleus are joined together in a single straight chain, they are said to form a simple or normal chain. 1934 Jrnl. Franklin Inst. 218 145 Among organic chemical compounds the straight-chain hydrocarbons are of particular interest because of the simplicity of their properties. 1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. iv. 138 A relatively simple example is provided by the difference between the branched and straight-chain hydrocarbons. 1971 New Scientist 24 June 761/2 The use of conventional straight-chain polymers seems to be restricted by an upper temperature limit of about 550°C, but the ladder polymers (so-called because of their integral cross-linked structure) offer more exciting possibilities. < as lemmas |
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