| 释义 |
polyvinylidene Chem.|ˌpɒlɪvaɪˈnɪlɪdiːn, -vaɪˈnaɪlɪdiːn|
[f. poly- + vinylidene.]
a. Used attrib. in the names of substances which are polymers of vinylidene compounds, esp. polyvinylidene chloride, any of a class of resinous polymers of vinylidene chloride which have the structure {b1}[CH2{b1}CCl2]n{b1}, and have a wide range of applications, esp. as impact- and chemical-resistant films and fibres.
1940Chem. Rev. XXVI. 163 Natta and Rigamonti..found..polyvinylidene chloride to be quite highly crystalline. 1942Industr. & Engin. Chem. Mar. 327/2 These polyvinylidene chloride plastics are known by the trade name, ‘Saran’. 1964Discovery Oct. 17/1 The lamination consists of an aluminum foil and three plastic films—one of polythene, another of polyvinylidene chloride and a third of polyester. 1966McGraw-Hill Encycl. Sci. & Technol. X. 496/2 Films of polyvinylidene chloride, and especially the copolymer containing about 15% of vinyl chloride, are resistant to moisture and gases. 1973Materials & Technol. VI. viii. 547 Because of its resistance to chemicals, polyvinylidene fluoride is used for tubes, valves, and pumps in the chemical industry. 1975P. Browne Bodywork Maintenance vi. 79/2 Cloths such as Tygan, woven from polyvinylidene chloride filaments, need an interlayer..to prevent a chemical reaction between the Tygan and the rubber.
b. Any of the synthetic resins prepared from vinylidene compounds. Freq. attrib.
1941Plastics V. 249/2 (caption) Flow sheet showing production of polyvinylidene polymers from petroleum and brine. 1960Times Rev. Industry Sept. 65/3 The tendency seems to be for polythene yarns to replace some of the earlier types such as polyvinylidene. 1963A. J. Hall Textile Sci. ii. 18 (table) Polyvinyls and polyvinylidenes. 1972Homes & Gardens Mar. 107 One firm has now introduced a full gloss emulsion paint based on a polyvinyledene [sic] medium. |