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Topics related to "polymer"

polymer
polymer , chemical compound with high molecular weight consisting of a number of structural units linked together by covalent bonds (see chemical bond ). The simple molecules that may become structural units are themselves called monomers; two monomers combine to form a dimer, and three monomers, a... Read more
latex
latex emulsion of a polymer (e.g., rubber ) in water (see colloid ). Natural latexes are produced by a number of plants, are usually white in color, and often contain, in addition to rubber, various gums, oils, and waxes. Balata, caoutchouc, chicle, and gutta-percha are produced from natural late... Read more
vinyl plastics
vinyl plastics group of thermoplastics used in molded products, flexible tubing, material for raincoats, and laminated safety glass. Vinyl plastics are polymers and copolymers of vinyl derivatives (i.e., derivatives of ethylene, H 2 C[symbol]CH 2 ), e.g., vinyl chloride (H 2 C=CHCl) and vinyl a... Read more
thermoplastics
thermoplastics materials that soften or melt when heated and harden when cooled. Thermoplastic polymers consist of long polymer molecules that are not linked to each other. i.e., have no cross-links. They are often supplied as granules and heated to permit fabrication by methods such as molding or ... Read more
macromolecule
macromolecule term that may refer either to a crystal such as a diamond, in which the atoms are identical and held by covalent bonds (see chemical bond ) of equal strength, or to one of the units that compose a polymer . Macromolecules such as proteins and nucleic acids are vital to the functio... Read more
gutta-percha
gutta-percha , natural latex obtained from Palaquium gutta and several other evergreen trees of East Asia. The latex, collected by felling or girdling the tree, is allowed to coagulate and is then washed, purified, and molded into bricks for shipping. Like caoutchouc , gutta-percha is a polyter... Read more
melamine
melamine , common name for 2,4,6-triamino-1,3,5-triazine. Melamine is a trimer (see polymer ) of cyanamide, H 2 NC[triple bond]N, and is synthesized from calcium carbide. It condenses with formaldehyde to give a thermosetting resin . Melamine resins have many uses, including the manufacture of pla... Read more
polyethylene
polyethylene , widely used plastic . It is a polymer of ethylene , CH 2 [symbol]CH 2 , having the formula (-CH 2 -CH 2 -) n , and is produced at high pressures and temperatures in the presence of any one of several catalysts , depending on the desired properties for the finished product. Polyet... Read more
polypropylene
polypropylene , plastic noted for its light weight, being less dense than water; it is a polymer of propylene. It resists moisture, oils, and solvents. Since its melting point is 121°C (250°F), it is used in the manufacture of objects that are sterilized in the course of their use. Polyp... Read more
polyvinyl chloride
polyvinyl chloride (PVC), thermoplastic that is a polymer of vinyl chloride. Resins of polyvinyl chloride are hard, but with the addition of plasticizers a flexible, elastic plastic can be made. This plastic has found extensive use as an electrical insulator for wires and cables. Cloth and pape... Read more

Encyclopedia entries related to "polymer"

Polymer
Encyclopedia entry from: UXL Encyclopedia of Science Polymer A polymer is a very large molecule in which one or two small units is repeated...Imagine that a monomer can be represented by the letter A. Then a polymer made of that monomer would have the structure: -A-A-A-A-A...
polymer
Book article from: The Columbia Encyclopedia, Sixth Edition polymer , chemical compound with high molecular...polyethylene , -H 2 C-CH 2 -. In a linear polymer, the structural units are connected in...bonding sites), a nonlinear, or branched, polymer results. Ethylene, styrene, and ethylene...
Plastics
Encyclopedia entry from: UXL Encyclopedia of Science ...a noun, the term describes a natural or synthetic polymer. A polymer is a material whose molecules consist of very long...units known as monomers. As an example, the synthetic polymer called polyethylene consists of thousands of ethylene...
Glycol
Encyclopedia entry from: The Gale Encyclopedia of Science ...and symbols. Polyester — A polymer in which the identical repeating units...ethylene terephthalate) — A polymer formed by the reaction of ethylene glycol...terephthalic acid (or its dimethyl ester). Polymer — A compound of high molecular...
Lithography
Encyclopedia entry from: The Gale Encyclopedia of Science ...integrated circuits. In this case, a polymer resist is used to repel the subsequently...photoresist — A type of photosensitve polymer that leaves a barrier only where exposed...fabrication that uses a light-sensitive polymer to pattern a silicon wafer with other...
Artificial Fibers
Encyclopedia entry from: UXL Encyclopedia of Science ...Most artificial fibers are polymers. A polymer is a chemical substance that is produced...The beginning molecule used in making a polymer is called a monomer. When two different...are produced is called spinning. When a polymer is first produced, it is generally a...
Adhesive
Encyclopedia entry from: The Gale Encyclopedia of Science ...far the most widely used adhesives are polymer based. Synthetic adhesives can be made...penetrate the substrate surface, often via polymer diffusion. This type of bonding depends on the ability of the polymer adhesive to diffuse into the bonded surface...
Monomer
Encyclopedia entry from: The Gale Encyclopedia of Science ...Vinyl Monomers Name – R Use of polymer Ethylene – H Plastic Vinyl chloride...diene monomers Name – R Use of polymer Butadiene – H Tires Isoprene...Name – R – X Use of polymer Vinylidene fluoride – H...
Paul Flory
Encyclopedia entry from: Encyclopedia of World Biography ...For example, polyethylene, a common polymer, can consist of anywhere from a few hundred...learning more about the physical structure of polymer molecules. That task was made more difficult...variability of size and shape from one polymer molecule to another—even among...
Amides
Encyclopedia entry from: The Gale Encyclopedia of Science ...between these two substances forms a long polymer, somewhat similar to the structure of...chains of the material. Another type of polymer is formed when two of the simplest organic...polymers held together by amide bonding. Polymer — A large molecule made up of...

Dictionary entries related to "polymer"

polymer
Book article from: A Dictionary of Nursing polymer ( pol -im-er) n. a substance formed by the linkage of a large number of smaller molecules known as monomers . An example of a monomer is glucose, whose molecules link together to form glycogen, a polymer.
dye-polymer media
Book article from: A Dictionary of Computing dye-polymer media A class of optical recording media in which the sensitive layer...binder. Both rewritable and write-once recording are possible. Dye-polymer media are potentially cheaper than those using other materials (such...
magneto-optic storage
Book article from: A Dictionary of Computing ...magnetic recording. M-O media compete with dye-polymer media in the rewritable disk field. Dye-polymer media are in principle cheaper to make and need a simpler...media were produced some years before comparable dye-polymer media.
nucleic acids
Book article from: A Dictionary of Food and Nutrition ...pyrimidines are called bases. DNA is a double‐stranded polymer (the so‐called ‘double helix’...carbon sugar deoxyribose. RNA is a single‐stranded polymer containing the sugar ribose. They are not nutritionally important...
starch
Book article from: A Dictionary of Food and Nutrition starch Polysaccharide , a polymer of glucose units; the form in which carbohydrate is stored in the...different proportions of two major forms: amylose, which is a linear polymer and amylopectin, which has a branched structure. The mixture of...
Plastics
Dictionary entry from: Dictionary of American History ...called polymers. The organic material generally used is coal, oil, natural gas, or wood. Plastics have a high molecular weight; for instance, the molecular weight of oxygen is 32, and that of a polymer is between 10,000 and 500,000
Lebedev, Sergei Vasilievich
Dictionary entry from: Complete Dictionary of Scientific Biography ...By 1930 the process was being carried out in and experimental plant. Full factory production began in 1932-1933. The polymer had a structure different from that of natural rubber, but Lebedev showed that it was a fully satisfactory substitute. Lebedev...
copolymer
Book article from: The Oxford Pocket Dictionary of Current English co·pol·y·mer / kōˈpäləmər / • n. Chem. a polymer made by reaction of two different monomers, with units of more than one kind.
polysaccharide
Book article from: A Dictionary of Zoology polysaccharide A linear or branched polymer composed of 10 or more monosaccharides linked by glycosidic bonds.
haemocyanin
Book article from: A Dictionary of Zoology haemocyanin ( hemocyanin ) A blue, copper-containing, respiratory pigment that is found free in the blood plasma of molluscs and crustaceans. It is a non-haem compound that is a polymer of smaller monomeric units.

Thesaurus entries related to "polymer"

degrade
Book article from: The Oxford American Writers Thesaurus ...cheapen, devalue; shame, humiliate, humble, mortify, abase, dishonor; dehumanize, brutalize. See note at humble. antonym: dignify.   2. the polymer will not degrade synonyms : break down, deteriorate, degenerate, decay.
dissolution
Book article from: The Oxford American Writers Thesaurus ...up/down, discontinuation, suspension, disbanding; prorogation, recess.   2. technical the dissolution of a polymer in a solvent synonyms : dissolving, liquefaction, melting, deliquescence; breaking up, decomposition, disintegration...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Polymer banknotes--a viable alternative to paper banknotes.
Magazine article from: Asia-Pacific Business Review; 4/1/2008; ; 700+ words ; ...Rica, Haiti, and Isle of Man issued polymer bank notes in 1983. These bank notes...develop processes and technology for polymer bank notes. In the process many security features had been incorporated in polymer bank notes. Some of these are (i...
Polymer Solutions Announces Signing of Definitive Agreement for Sale of Its Operations.
PR Newswire; 10/29/2003; 700+ words ; Polymer Solutions, Inc., (OTC Bulletin Board: PYSU...from AMT Environmental Products, Inc., Polymer Solutions' wholly-owned subsidiary. AMT represents substantially all of Polymer Solutions' assets. Pursuant to this Agreement...
Examine the Polymer Absorbents and Adsorbents, Including SAPs and Polymer Gels.(Company overview)
Business Wire; 11/13/2008; 700+ words ; ...related to the Chemicals industry is available in its catalogue. Polymer Absorbents and Adsorbents, Including SAPs and Polymer Gels http://www.reportlinker.com/p096614/Polymer-Absorbents-and- Adsorbents-Including-SAPs-and-Polymer...
Functionalizing polymer surfaces by field-induced migration of copolymer additives--role of shear fields.(Statistical Data Included)
Magazine article from: Polymer Engineering and Science; 7/1/2002; ; 700+ words ; ...initially homogeneously dispersed in a viscous polymer host might migrate to the surface of the host polymer under the action of shear in melt processing...which slip-promoting soaps migrate to polymer/die interfaces during extrusion processing...
Polymer-based drilling fluids: boosting the effectiveness of geotechnical drilling in shale.
Magazine article from: National Driller; 1/1/2005; ; 700+ words ; ...quantitative understanding of the performance of polymer-based slurries for geotechnical drilling...efficiently and effectively specify the use of polymer-based slurries. [ILLUSTRATION OMITTED...partially hydrolyzed polyacrylamide (PHPA) polymer products from two manufacturers. Shale...
Polymer reacquires its shares from Titan.(News)
Magazine article from: Tire Business; 8/18/2003; 700+ words ; Byline: Brad Dawson Polymer Enterprises Inc. has purchased about...based tire and rubber product maker. Polymer announced June 25 it had acquired 57...Specialty Tires of America (STA) Inc. Polymer is the parent company of STA. The acquisition...
Clay/polymer nanocomposite for pressure-sensitive adhesives.
Magazine article from: Adhesives & Sealants Industry; 11/1/2004; ; 700+ words ; ...Rohm and Haas has been investigating unique polymer/clay nanocomposites based on pressure-sensitive...stable latexes with clay in or adhered to the polymer particle. The emulsion polymer/clay nanocomposites have different (and advantageous...
Polymer concrete: Foundational protection for the mining industry
Magazine article from: Mining Engineering; 3/1/2001; ; 700+ words ; ...PA has addressed through the new technology of polymer concrete. The SX/EW process works by bathing metal...s most revolutionary advances are in the realm of polymer concrete. Polymer concrete Polymer concrete is a castable material...
Polymer Group, Inc. Announces Installation of New APEX(R) Capacity; Oriented Polymer Expansion
PR Newswire; 2/20/1998; 700+ words ; ...S.C., Feb. 20 /PRNewswire/ -- Polymer Group, Inc. (NYSE: PGH) announced...APEX(R) capabilities with proprietary Polymer Group technology, giving the new line...replacement materials. In addition, Polymer Group announced that, as part of the...
Polymer Solutions Announces Signing of Letter of Intent.
PR Newswire; 8/7/2003; 700+ words ; Polymer Solutions, Inc., (OTC Bulletin Board...of the issued and outstanding stock of Polymer Solutions. Pursuant to the letter of intent...existing shareholders and option holders of Polymer Solutions will receive cash in exchange...