Only show
results for:

Topics related to "polymers"

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 "polymers"

addition polymers
Book article from: The Columbia Encyclopedia, Sixth Edition addition polymers see polymer .
Polymer
Encyclopedia entry from: UXL Encyclopedia of Science ...give an accurate formula for such a polymer. Natural polymers Polymers are very common in nature; some of the most widespread naturally occurring substances are polymers. Starch and cellulose are examples. Green plants...
Paul Flory
Encyclopedia entry from: Encyclopedia of World Biography ...1985), founder of the science of polymers, was a researcher in macronuclear chemistry...recognized as the founder of the science of polymers. The Nobel Prize in chemistry he received...neoprene. Flory's opportunity to study polymers was ironic in that, prior to this job...
polymer
Book article from: The Columbia Encyclopedia, Sixth Edition ...divinyl benzene are both polyfunctional. Polymers containing a single repeating unit...polyethylene, are called homopolymers. Polymers containing two or more different structural...formaldehyde, are called copolymers. All polymers can be classified as either addition...
Monomer
Encyclopedia entry from: The Gale Encyclopedia of Science ...form the fundamental building blocks of polymers, synthetic resins, and elastomers...hexamethylenediamine. There are a number of other polymers formed by addition polymerization from...constitute another class of addition polymers. Dienes monomers have the following...
Plastics
Encyclopedia entry from: The Gale Encyclopedia of Science ...polystyrene, and nylon 66. The first polymers used by man were actually natural products...Certain proteins that are in fact natural polymers once had commercial importance as industrial...chains, and hence are also known as polymers or macromolecules. Elements present...
SIC 2821 Plastic Materials and Resins
Encyclopedia entry from: Encyclopedia of American Industries ...prices. Production. Plastics are giant polymers, or long-chain molecules that contain...other ingredients called additives, the polymers can be shaped and molded under heat and...be added to the resin, as may other polymers, which form a polymer blend or alloy...
Resins
Encyclopedia entry from: The Gale Encyclopedia of Science ...although the term resin when applied to polymers actually antedates the understanding of the chemistry of polymers and originally referred to the resemblance...association also come to refer to synthetic polymers. The term natural resins usually refers...
Dielectric Materials
Encyclopedia entry from: The Gale Encyclopedia of Science ...kinds of rubber, glass, wood, and polymers among the solids; and hydrocarbon oils...and methyl alcohol: 33.1. Synthetic polymers are now widely used as dielectrics...other desirable qualities. Among the polymers now used as dielectrics are the polyethylenes...
Elizabeth F. Neufeld
Encyclopedia entry from: Encyclopedia of World Biography ...with Hassid) she studied the biosynthesis of plant cell wall polymers— which would prove significant when she began studying...problems, and a short life span. Because some plant cell wall polymers contain uronic acids (a component of mucopolysaccharides...

Dictionary entries related to "polymers"

Carothers, Wallace Hume
Dictionary entry from: Complete Dictionary of Scientific Biography ...investigation at Du Pont was the synthesis of polymers of high molecular weight by means of...a great number and variety of linear polymers of general formula xAzBz ( AzBz ) n AzBy...attained some minimum high value, the polymers proved capable of being formed into fibers...
Chemical Industry
Dictionary entry from: Dictionary of American History ...are a broad chemical category including polymers, bulk petrochemicals and intermediates...generally less than fifty cents per pound. Polymers, the largest revenue segment at about...use. The principal raw materials for polymers are bulk petrochemicals. Chemicals in...
Kipping, Frederick Stanley
Dictionary entry from: Complete Dictionary of Scientific Biography ...the forerunners of the organosilicon polymers. Turning to a detailed investigation...of oxygen-containing organosilicon polymers. Although Kipping was unable to prepare...led to the synthesis of many silicon polymers and to a clear exposition in his fifty...
Meyer, Kurt Heinrich
Dictionary entry from: Complete Dictionary of Scientific Biography ...centered on the chemistry of natural high polymers, a study to which he recruited the young...survey of naturally occurring organic polymers (cellulose, starch, proteins, rubber...published as Natural and Synthetic High Polymers (New York, 1942; 2nd ed., 1950...
Plastics
Dictionary entry from: Dictionary of American History ...1920s was critical in explaining how the plastic molecules, polymers, were created. Once his work was accepted in the 1930s...plastics are organic substances made up of huge molecules called polymers. The organic material generally used is coal, oil, natural...
Industrial Research
Dictionary entry from: Dictionary of American History ...Wallace Carothers developed and published the general theory of polymers, and went on in 1930 to create synthetic rubber; and then...decade elapsed to get from the beginning of research in super polymers to the production of nylon on commercial terms. The Golden...
Nametkin, Sergey Semenovich
Dictionary entry from: Complete Dictionary of Scientific Biography ...the hydro-dehydropolymerization re- action — as a result of which hydrogenated lower- polymers and highly unsaturated higher-polymers are formed in the presence of acid catalysts; showed that thiophanes constitute a significant part...
carbohydrate
Book article from: A Dictionary of Food and Nutrition ...be considered among the unavailable carbohydrates . Larger polymers of carbohydrates are known as polysaccharides or complex carbohydrates...polysaccharides can be distinguished: (1)starches, which are polymers of glucose units, either as a straight chain (amylose) or...
plastic
Book article from: A Dictionary of Architecture and Landscape Architecture ...class of artificial substances which are usually carbon-based polymers (i.e. with molecular structures made up largely or wholly...bonded units) derived from synthetic resins or modified natural polymers, and with added substances giving colour and improved performance...
Fankuchen, Isidor
Dictionary entry from: Complete Dictionary of Scientific Biography ...of publications, with Mark and others (1943 – 1949), Fankuchen studied fibers — chrysolite, chain polymers, fibrous proteins, and so forth. For this delicate work he devised a microcamera, in which the bore of a thermometer provided...

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

Polymers 101: an introduction to multi-unit molecules.
Magazine article from: Adhesives & Sealants Industry; 5/1/2008; 700+ words ; ...by hooking together hundreds of paper clips to form chains. THE STRUCTURE OF POLYMERS Many common classes of polymers are composed of hydrocarbons. These polymers are specifically made of small units bonded into long chains. Carbon makes up...
Bamberger Polymers to Celebrate 30 Years of Outstanding Service in the Plastics Industry
PR Newswire; 11/25/1996; 700+ words ; ...25 /PRNewswire/ -- As Bamberger Polymers prepares to celebrate 30 years of outstanding...Mexico and Hong Kong. "Bamberger Polymers attributes its growth and success to...Chief Executive Officer of Bamberger Polymers. "Over the past 30 years, Bamberger...
Biodegradable polymers in adhesive systems.
Magazine article from: Adhesives & Sealants Industry; 6/1/2007; ; 700+ words ; ...years in the development of biodegradable polymers. These materials have been developed...a range of industries. Many of these polymers are suited for adhesive applications...and biomedical devices. Biodegradable polymers based on renewable resources are also...
Advanced Polymers for Medical Applications; Materials, product development, and market opportunities.
M2 Presswire; 7/9/2002; 700+ words ; ...PRESSWIRE-9 July 2002-SMI: Advanced Polymers for Medical Applications; Materials...delivery and even conductivity, polymers are proving to be more versatile and complex than ever before. Advanced Polymers for Medical Applications examines...
Noble Polymers Introduces New Brand Initiative; Resin supplier expanding into new markets, increasing R&D.
PR Newswire; 12/8/2003; 700+ words ; ...Mich., Dec. 8 /PRNewswire/ -- Noble Polymers, LLC, a supplier of specialized plastic polymers and resins, today announced the launch...molders. Grand Rapids, Mich.-based Noble Polymers, which began as a materials research and...
Birmingham Polymers (BPI) Announces E-Commerce for Ordering Biodegradable Polymers.
PR Newswire; 2/25/2002; 700+ words ; BIRMINGHAM, Ala. -- Birmingham Polymers, Inc. (BPI), a Birmingham, AL based...site so that its customers may now order polymers on-line, paying via credit card and have their polymers shipped the next day via Federal Express...
Bayer Polymers to restructure, may form product partnerships. (Business & Finance News).(Brief Article)
Magazine article from: Chemical Week; 5/21/2003; ; 700+ words ; Bayer Polymers says it is "reviewing" its portfolio with...groups." Hagen Noerenberg, CEO of Bayer Polymers, announced the plans at a recent presentation in Cologne, Germany. Bayer Polymers is one of Bayer's four manufacturing subsidiaries...
Conductive polymers give researchers a big jolt.
Magazine article from: R & D; 10/1/1991; ; 700+ words ; ...laboratory curiosity. The first conductive polymers date back to the early 1970s when polysulfur...1980s, however, additional conductive polymers were developed, including doped versions...double bonds. The structures of these polymers can be linear, such as in polyacetylene...
PAS Announces Polymers NLC(TM); Customer Demand for Polymers NLC Includes New Commitments for Polyethylene, Polypropylene, Polystyrene, Polyvinyl Alcohol, and Styrenic Block Copolymers Production Lines Totaling Over 20 New Lines.
PR Newswire; 10/22/2004; 700+ words ; ...PRNewswire/ -- PAS today announced Polymers NLC, a non- linear advanced control...NLC(R) controller and optimizer in Polymers NLC has been installed at nearly 30 polymer...and other polyolefins and specialty polymers. This is the first new release of this...
U.S. Polymers in Medical Tubing and Catheters - Proliferation of Medical Procedures Drives Growth in U.S. Polymers Market.
M2 Presswire; 8/14/2009; 700+ words ; ...2009-Research and Markets: U.S. Polymers in Medical Tubing and Catheters - Proliferation...Medical Procedures Drives Growth in U.S. Polymers Market(C)1994-2009 M2 COMMUNICATIONS...researchandmarkets.com/research/b79d58/u_s_polymers_in_m) has announced the addition...