| 释义 |
terephthalic, a. Chem.|tɛrəfˈθælɪk|
[f. tere-bic + phthalic.]
Derived from or containing terebic and phthalic acids, as in terephthalic acid (also called insolinic acid), C8H6O4 = C6H4(CO2H)2, a dibasic acid produced as a white tasteless crystalline powder, nearly insoluble in water, alcohol, and ether.
1857Miller Elem. Chem. III. vii. §1. 443 The second is isomeric with phthalic acid, and is hence termed terephthalic acid. 1868Watts Dict. Chem. V. 725. 1964 N. G. Clark Mod. Org. Chem. xxiii. 491 Terephthalic acid, after conversion to the dimethyl ester, is an important intermediate in the manufacture of ‘Terylene’. 1971D. Potter Brit. Eliz. Stamps ii. 27 Lettalite B.3 or tere-phthalic acid became known as violet phosphor. 1973Materials & Technol. VI. iv. 326 The starting materials for the manufacture of polyethylene terephthalate are ethylene glycol and terephthalic acid, both obtained from petroleum sources.
Hence tereˈphthalamide, an amide of terephthalic acid: see quot. 1868; tereˈphthalate (also teˈre-), a salt of this acid.
1868Watts Dict. Chem. V. 726 Terephthalate of Ammonium..crystallises, by slow evaporation, in small crystals having a strong lustre. Ibid., Terephthalic amides. 1. Terephthalamide, C8H8N2O2{b2}N2H4.(C8H4O2){pp}, produced by the action of ammonia on terephthalic chloride, is a white amorphous body, not dissolved by any solution. 1946, etc. [see polyethylene terephthalate s.v. polyethylene a]. 1958Times Rev. Industry Aug. 57/3 Mylar polyester film..is a polyester terephthalate film. 1973Materials & Technol. VI. iv. 280 While other fibre-forming polyesters were prepared, none proved to be as satisfactory as the polyethylene terephthalate developed by Whinfield, and this has continued to dominate the commercial fibre-forming polyester field. |