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.
| 1940 Chem. Rev. XXVI. 163 Natta and Rigamonti..found..polyvinylidene chloride to be quite highly crystalline. 1942 Industr. & Engin. Chem. Mar. 327/2 These polyvinylidene chloride plastics are known by the trade name, ‘Saran’. 1964 Discovery 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. 1966 McGraw-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. 1973 Materials & Technol. VI. viii. 547 Because of its resistance to chemicals, polyvinylidene fluoride is used for tubes, valves, and pumps in the chemical industry. 1975 P. 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.
| 1941 Plastics V. 249/2 (caption) Flow sheet showing production of polyvinylidene polymers from petroleum and brine. 1960 Times Rev. Industry Sept. 65/3 The tendency seems to be for polythene yarns to replace some of the earlier types such as polyvinylidene. 1963 A. J. Hall Textile Sci. ii. 18 (table) Polyvinyls and polyvinylidenes. 1972 Homes & Gardens Mar. 107 One firm has now introduced a full gloss emulsion paint based on a polyvinyledene [sic] medium. |