polyether


polyether
/pol'ee ee"theuhr/ n. Chem.
a polymeric ether.
[1920-25; POLY- + ETHER]

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      any of a class of organic substances prepared by joining together or polymerizing many molecules of simpler compounds (monomers) by establishing ether links between them; polyethers, which may be either chainlike or networklike in molecular structure, comprise an unusually diverse group of polymers.

      Polyethylene glycols are water-soluble liquids or waxy solids used in cosmetic and pharmaceutical preparations and in the manufacture of emulsifying or wetting agents and lubricants. Polypropylene glycols are liquids, mostly insoluble in water, used to suppress foaming in industrial processes and for making polyurethane resins, hydraulic fluids, and various other materials.

      Epoxy resins, widely used as coatings and adhesives, are prepared by converting liquid polyethers into infusible solids by connecting the long-chain molecules into networks, a process called curing. Phenoxy resins are polyethers similar to those used in epoxies, but the polymers are of higher molecular weight and do not require curing; they are used mostly as metal primers. Polyphenylene oxide resins, such as Noryl, possess great resistance to water and to high temperatures (175°–300° C; 350°–575° F). Penton, a chlorine-containing polyether unaffected by many chemicals, is fabricated into sheets used for lining storage tanks and the like.

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Universalium. 2010.

Look at other dictionaries:

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  • Polyether — Polyéther Un polyéther est un polymère dont le squelette macromoléculaire contient des motifs de répétition contenant la fonction chimique éther. Un exemple est le polyoxyéthylène dont le motif de répétition correspond à la formule chimique  …   Wikipédia en Français

  • Polyether — Als Ether, per IUPAC: Alkoxyalkane, nicht fachsprachlich Äther, werden organische Verbindungen mit einer Sauerstoffbrücke zwischen zwei Alkyl oder Aryl Resten als funktioneller Gruppe bezeichnet. Der in der Umgangssprache bekannte „Ether“… …   Deutsch Wikipedia

  • Polyéther — Un polyéther est un polymère dont le squelette macromoléculaire contient des motifs de répétition contenant la fonction chimique éther. Les chaînes macromoléculaires des polyéthers ont généralement comme groupes terminaux des fonctions hydroxyles …   Wikipédia en Français

  • polyether — polieteris statusas T sritis chemija apibrėžtis Stambiamolekulis junginys, kurio pagrindinėje grandinėje yra periodiškai pasikartojančių ≡COC≡ grupių. atitikmenys: angl. polyether rus. простой полиэфир …   Chemijos terminų aiškinamasis žodynas

  • polyether — noun a polymer, such as an elastomer, in which carbon atoms of the repeating units are joined by a single oxygen atom …   Wiktionary

  • Polyether — Po|ly|e|ther: in der Polymerchemie Sammelbez. für Verb. der allg. Formel (̶O R)̶n, in denen Sauerstoff Atome als Etherbrücken Alkylen oder Arylengruppen verbinden; im ersteren Fall liegen Poly(oxyalkylene) vor, z. B. ↑ Polyalkylenglykole, im… …   Universal-Lexikon

  • polyether — poly·ether (pol″e eґthər) an elastomer made from cyclic ether, used in paste form as an impression material for fixed partial prosthodontic structures, inlays for single quadrants, and dental impressions …   Medical dictionary

  • polyether — poly·ether …   English syllables

  • polyether — ¦pälēˌ noun Etymology: poly + ether : any of a group of polymers in which the repeating unit contains a carbon oxygen bond derived especially from an aldehyde or an epoxide and which are used especially in the manufacture of plastic foams …   Useful english dictionary


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