| 释义 |
polyester|pɒlɪˈɛstə(r)|
[f. poly- + ester.]
Any polymer in which the units are joined by the ester linkage, {b1}CO·O{b1}; also (a) (more fully polyester fibre), a man-made fibre consisting of a polyester; (b) (more fully polyester resin), any of numerous synthetic resins or plastics consisting of or made from a polyester, different kinds of which are used as fibres or films, in paint, and as moulding materials or reinforced plastics. Freq. attrib.
1929[see polyamide]. 1935C. Ellis Chem. Synthetic Resins II. l. 1002 Strong, oriented fibers were obtained from polyesters of molecular weights greater than 9330. 1952Jrnl. R. Aeronaut. Soc. LVI. 707 Working with glass fibres, the Americans have used the polyester or ‘contact resins’ almost exclusively. 1955Times 4 May 21/3 Production items based on polyester resins and glass fibres..include panels and bodies for the transport and aircraft industries, mouldings for boat hulls, [etc.]. 1958Times Rev. Industry Feb. 77/1 The advent of resins of the polyester and epoxide types..meant that laminates could be produced without the application of high pressures. 1958Engineering 7 Mar. 311/1 Cellulose-acetate and, more recently, polyester are used at present for data-recording tape bases. 1958Manch. Guardian 25 Sept. 1/3 Polyester fibre was discovered in 1941 by Mr. J. R. Whinfield and Dr. J. T. Dickson in the laboratories of the Calico Printers' Association. 1964Which? Aug. 253/3 Fabrics made from polyester tend to attract dirt but can be easily washed. 1968J. Ironside Fashion Alphabet 210 Polyester fibres have very similar properties to the polyamides but they are perhaps even more durable. 1969L. S. Mounts in W. R. R. Park Plastics Film Technol. v. 135 Polyester films have great strength and good aging characteristics. 1973Materials & Technol. VI. viii. 568 The polyesters are usually marketed dissolved in the cross-linking monomer in the form of a syrup, to which inhibitors are added. 1975Guardian 27 Jan. 16/3 Today the accent is on..blends of a polyester fibre with cotton or polynosic rayon. 1977R.A.F. News 22 June–5 July 2 (Advt.), ‘Tootal’ Polyester/Cotton Wedgwood Blue Shirts.
Hence ˌpolyesteˈramide, any polymer which contains both ester and amide linkages, esp. any of various rubbery materials of this type which are usu. made by mixed condensation reactions and can be drawn into fibres; ˌpolyesterifiˈcation, a reaction or process which yields a polyester.
1932Jrnl. Amer. Chem. Soc. LIV. 1560 The polyesterification thus consists in a series of intermolecular couplings resulting in the formation of progressively longer chains. 1943H. L. Foster U.S. Pat. 2,333,922 1/1 The above objects are accomplished through the production of electrically insulated conductors in which the insulation is a polyester-amide which has been treated with polyisocyanate. 1950Thorpe's Dict. Appl. Chem. (ed. 4) X. 45/2 Among the second class of amide interpolymers are the polyesteramides. These are made by condensing together di-reactive amide-forming and ester-forming components, or more specifically by condensing di-reactive components containing carboxy groups in proportions equivalent to the sum of the amine and hydroxyl groups. 1958Technology Mar. 12/3 Not long after Carothers' pioneering work, J. R. Whinfield took up the study of similar polyesterification processes, the main idea being to use starting materials which might give some sense of rigidity to the high-polymer substances made by these reactions. 1974K. F. Heinisch Dict. Rubber 508/2 The production of the polyesteramide is performed without a deficiency of dicarboxylic acid, as for Vulcolan. 1976Nature 24 June 658/2 This demonstrated that ester interchange reactions were slow compared with polyesterification in the conditions used to make commercial alkyd resins. |