Information om | Engelska ordet POLYETHER

Exempel på hur man kan använda POLYETHER i en mening

• Its major application is its use for the production of polyether polyols for use in making polyurethane plastics.
• Their best known toys are their dart guns (referred to by Hasbro as "blasters") that shoot ammunition made from "Nerf foam" (partially reticulated polyether type polyurethane foam).
• The most common polymers in membrane synthesis are cellulose acetate, Nitrocellulose, and cellulose esters (CA, CN, and CE), polysulfone (PS), polyether sulfone(PES), polyacrilonitrile (PAN), polyamide, polyimide, polyethylene and polypropylene (PE and PP), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinylchloride (PVC).
• Between 60 and 70% of propylene oxide is converted to polyether polyols by the process called alkoxylation.
• A polyyne compound with 10 acetylenic units (20 atoms), with the ends capped by Fréchet-type aromatic polyether dendrimers, was isolated and characterized in 2002.
• The starting materials are similar to those used in polyurethane (PUR) except that the proportion of methylene diphenyl diisocyanate (MDI) is higher and a polyester-derived polyol is used in the reaction instead of a polyether polyol.
• Furthermore, since ether groups are always present in these polysulfones, PAESs are also referred to as polyether sulfones (PES), poly(arylene sulfone)s or simply polysulfone (PSU).
• However, Andrew Gallimore and Jonathan Spencer have questioned the structure of maitotoxin at a single ring-junction (the J–K junction), based purely on biosynthetic considerations and their general model for marine polyether biogenesis.
• silicones (polyvinyl siloxane): condensation-cured silicones, addition silicones, vinyl polyether silicones (VPES).
• Brevetoxin (PbTx), or brevetoxins, are a suite of cyclic polyether compounds produced naturally by a species of dinoflagellate known as Karenia brevis.
• Other applications of 4,4′-oxydianiline include the production of poly(amide)imide resins (which are used in the manufacture of heat-resistant wire enamels and coatings), as an intermediate in the manufacture of epoxy resins and adhesives, and in the production of aromatic polyether imides.
• This algae species is capable of producing a variety of bioactive polyketide natural products such as ciguatoxin with characteristic fused-ring cyclic polyether structure.
• While a producer organism for Halichondrin B has never been isolated in pure culture, the structural features of Halichondrin B, such as the 'odd-even' rule of methylation, and the abundance of oxygen heterocycles, suggest it is a product of dinoflagellate polyether metabolism.
• Gonyaulax spinifera has been connected to the production of yessotoxins (YTXs), a group of structurally related polyether toxins, which can accumulate in shellfish.
• Yessotoxins are a group of lipophilic, sulfur bearing polyether toxins that are related to ciguatoxins.
• Izatt and Christensen made the first extensive thermodynamic study using titration calorimetry of the highly selective metal complexation properties of metal-cyclic polyether interactions.
• Some of his most notable early work focused on the neurotoxins associated with "red tide" – which led to the determination of the three dimensional structures of saxitoxin, of the gonyautoxin group, and the cyclic polyether brevetoxin B.
• Polysulfone (PSU), poly(ethersulfone) (PES) and polyetherimide (PEI) for example are amorphous; poly(phenylene sulfide) (PPS), polyetheretherketone (PEEK) and polyether ketones (PEK), however are semi-crystalline.
• Gambierol is a ladder-shaped polyether, composed of eight ether rings, 18 stereocenters, and two challenging pyranyl rings having methyl groups that are in a 1,3-diaxial orientation to one another.
• Another method of hybridization is to make a PUD that is both anionic but with a very substantial nonionic modification utilizing a polyether polyol based on ethylene oxide.

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