| 单词 |
polycarbonate |
| 释义 |
polycarbonate Chem.|pɒlɪˈkɑːbəneɪt|
[f. poly- + carbonate n.]
†1. A carbonate containing several equivalents of the acid radical. Obs.
1886T. S. Hunt Mineral Physiol. & Physiogr. viii. 289 It was further declared that the carbon-spars must be represented as polycarbonates, having not less than from ‘twelve to eighteen equivalents of base replaceable so as to give rise to a great number of species’. 1891Chem. News 23 Oct. 212/2 (heading) Contamination of alkaline polycarbonates by heavy metals.
2. Any of a class of polymers in which the units are linked by the carbonate group, {b1}O·CO·O{b1}, many of which are thermoplastic resins widely used esp. as moulding materials and films. Also attrib.
1930Jrnl. Amer. Chem. Soc. LII. 315 It seems quite certain, therefore, that these polycarbonates are also open chains. 1959Mod. Plastics XXXVI. 39 Farben fabriken-Bayer..has been manufacturing polycarbonates on a commercial scale in Germany for nearly a year. 1965Wireless World Aug. 409/2 In the manufacture of an optical filter gold has been sputtered onto a polycarbonate substrate. 1969L. S. Mounts in W. R. R. Park Plastics Film Technol. v. 138 Due to good forming characteristics, heat resistance, and toughness, polycarbonate film and sheet are used in skin and blister packaging. 1976Sci. Amer. Feb. 19/2 (Advt.), The instrument is housed in a tough, high-impact polycarbonate case. 1978Skatcat's Quiz Bk. (R. Soc. Prevention of Accidents) 2/1 Also O.K. are polycarbonate laminates of glass or carbon-fibre reinforced resins with plywood cores. |
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