polyamide
(pɒlɪˈeɪmaɪd)
[f. poly- + amide.]
Any of a large class of polymers in which the units are linked by an amide group, {b1}CO·NH{b1}, and which includes many synthetic resins used commercially, notably fibres of the nylon group. Also attrib.
| 1929 Jrnl. Amer. Chem. Soc. LI. 2550 Polyintermolecular condensation requires as starting materials compounds in which at least two functional groups are present in the same molecule (e.g., hydroxy acids..might lead to poly⁓esters,..amino-acids, to poly-amides..). 1942 Endeavour Apr. 72/2 Nylon, the new and truly synthetic fibre (a polyamide) that is now rivalling natural silk. 1963 H. R. Clauser Encycl. Engin. Materials 501 The presence of the polyamide resin brings about the gelation and provides thixotropy to the paint. 1969 L. S. Mounts in W. R. R. Park Plastics Film Technol. v. 136 Polyamide films are produced from two types of nylon polymer. 1971 Daily Tel. (Colour Suppl.) 30 Apr. 8/3 The fabric..is an industrial nylon polyamide, tightly woven with a glistening surface and faintly translucent. 1972 Sci. Amer. Dec. 48/3 Some 10 different basic types of nylon are now produced, and the worldwide consumption of these polyamide fibres exceeds four billion pounds per year. |
Hence ˌpolyamiˈdation, a reaction or process which yields a polyamide.
| 1946 Chem. Rev. XXXIX. 146 The polyamidation reaction parallels closely the rate, temperature coefficient, and reaction order of monoamidations. 1961 Sorenson & Campbell Prep. Methods Polymer Chem. iii. 63 An alternative method for carrying out polyamidations from a nylon salt is to use a pipe autoclave. |