POLYCARBONATES

group of clear, thermoplastic polymers used mainly as molding compounds (see plastic). Polycarbonates are prepared by the reaction of an aromatic difunctional phenol with either phosgene or an aromatic or aliphatic carbonate. The commercially important polycarbonates use 2,2-bis (4-hydroxyphenol)-propane (bisphenol A) and diphenyl carbonate. This polymer is a clear plastic with a slight yellow discoloration. It has excellent electrical properties and a high impact strength.

____________________

The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

-38144-

Top...
Search the Library
Books
Journals
Magazines
Newspapers
Encyclopedia
Advanced Search
About Questia
Questia is the world's largest online academic library offering full-text books, journals, and articles on thousands of topics.

Join Now...
Questia Books and Articles on: Polycarbonates
We found: 53 results
By media type:
 

Books:

 

16  

 

Journal articles:

 

12  

 

Magazine articles:

 

14  

 

Newspaper articles:

 

8  

 

Encyclopedia articles:

 

3  
 

books on: Polycarbonates  - 16 results

       More book Results: 1-10 11-16 >>  
 
1.
A History of the International Chemical Industry
Book by Fred Aftalion, Otto Theodor Benfey; University of Pennsylvania Press, 1991
Subjects: Chemical Industry--History, Chemistry--History
...States simultaneously developed the polycarbonates on which Carothers had been working in the thirties. Polycarbonates were produced industriallyin 1960...sheets. Despitetheir high price, polycarbonates found important applications because...
2.
Environmental Management in Practice: Compartments, Stressors, and Sectors - Vol. 2
Book by B. Nath, L. Hens, P. Compton, D. Devuyst; Routledge, 1999
Subjects: Environmental Management--Methodology
...the preparation of diphenylcarbonate, an intermediate for polycarbonates and methylisocyanate; diallylcarbonate, an intermediate...used as a synthetic base for lubricating oils; aliphatic polycarbonates, used as intermediates for polyurethanes. The case of...
3.
Next Generation Environmental Technologies: Benefits and Barriers
Book by Robert J. Lempert, Parry Norling, Christopher Pernin, Susan Resetar, Sergej Mahnovski; Rand, 2003
Subjects: Environmental Chemistry--Industrial Applications, Environmental Management
...DMC can be used to manufacture many products, primarily polycarbonates, and polyurethanes but also pesticides and herbicides...manufacture of many products, especially polyurethane and polycarbonates. Alternative means of producing DMC could increase its...
4.
How It Works: Science and Technology - Vol. 13
Book by Marshall Cavendish; Marshall Cavendish, 2003
Subjects: Science--Encyclopedias, Technology--Encyclopedias
...aramids-stiff polyamides such as Kevlar. Polyesters and polycarbonates These plastics are made by reacting an organic acid that...C4t,-. This substance is used for moldings and films. Polycarbonates have a structural formula that corresponds to a polyester...
5.
Sustainable Cities
Book by Graham Haughton, Colin Hunter; Routledge, 2003
Subjects: Urban Ecology
...paper, soap, tanning, dye and agricultural industries. Phosgene Manufacture of some dyestuffs; carbonic acid esters (polycarbonates); manufacture of some insecticides and pharmaceuticals. Polychlorinated biphenyls Production, storage and transport...
More book Results: 1-10 11-16 >>

Top...
 

journal articles on: Polycarbonates  - 12 results

       More journal Results: 1-10 11-12 >>  
 
1.
Polycarbonate Plastics and Human BPA Exposure: Urinary Levels Rise with Use of Drinking Bottles
Journal article by Victoria Mcgovern; Environmental Health Perspectives, Vol. 117, 2009
Subjects: Bisphenol-A--Environmental aspects, Bisphenol-A--Health aspects, Bisphenol-A--Research, Polycarbonates--Environmental aspects, Polycarbonates--Health aspects, Polycarbonates--Research, Urinalysis--Usage, Urine--Analysis, Urine--Usage
Polycarbonate Plastics and Human BPA Exposure...states and cities banning BPA from polycarbonate baby bottles and other products sold...is known about whether the use of polycarbonate food or beverage containers actually...
2.
Polycarbonate Bottle Use and Urinary Bisphenol a Concentrations
Journal article by Jenny L. Carwile, Henry T. Luu, Laura S. Bassett, Daniel A. Driscoll, Caterina Yuan, Jennifer Y. Chang, Xiaoyun Ye, Antonia M. Calafat, Karin B. Michels; Environmental Health Perspectives, Vol. 117, 2009
Subjects: Bisphenol-A--Health aspects, Bisphenol-A--Research, Polycarbonates--Health aspects, Polycarbonates--Research, Urinalysis--Usage, Urine--Analysis, Urine--Usage
Polycarbonate Bottle Use and Urinary Bisphenol a...commonly used in the manufacture of polycarbonate plastic. Low-level concentrations...ingestion of food or beverages from polycarbonate containers increases BPA concentrations...
3.
Bisphenol A Is Released from Used Polycarbonate Animal Cages into Water at Room Temperature
Journal article by Kembra L. Howdeshell, Paul H. Peterman, Barbara M. Judy, Julia A. Taylor, Carl E. Orazio, Rachel L. Ruhlen, Frederick S. Vom Saal, Wade V. Welshons; Environmental Health Perspectives, Vol. 111, 2003
Bisphenol A is released from used polycarbonate animal cages into water at room temperature...food packaging, dental sealants, polycarbonate plastic, and many other products...We examined whether new and used polycarbonate animal cages passively release bioactive...
4.
Research
Journal article; Environmental Health Perspectives, Vol. 117, 2009
Subjects: Air pollution--Health aspects, Bisphenol-A--Health aspects, Bisphenol-A--Measurement, Bisphenol-A--Research, Halogen compounds--Environmental aspects, Halogen compounds--Health aspects, Halogen compounds--Research, Interleukin-6--Genetic aspects, Interleukin-6--Research, Polycarbonates--Health aspects, Polycarbonates--Research, Single nucleotide polymorphisms--Research, Thyroid hormones--Physiological aspects, Thyroid hormones--Research
...Research. EXPOSURE SCIENCE | Polycarbonate Bottle Use and Urinary BPA Bisphenol...of food and drink stored in polycarbonate plastic containers has not been...after the same students used polycarbonate plastic drinking bottles for...
5.
Chemical Aftermath: Contamination and Cleanup Following the Tohoku Earthquake and Tsunami
Journal article by Winifred A. Bird, Elizabeth Grossman; Environmental Health Perspectives, Vol. 119, 2011
Subjects: Chemicals--Environmental aspects, Earthquakes--Environmental aspects, Earthquakes--Japan, Tsunamis--Environmental aspects, Tsunamis--Japan
...in Japan. (14) Other facilities here are a Mitsubishi Gas Chemical plant whose products include hydrogen peroxide and polycarbonates; an Adeka Company plant that produces chlorinated inorganic chemicals, flame retardants, caustic soda, and other chemicals...
More journal Results: 1-10 11-12 >>

Top...
 

magazine articles on: Polycarbonates  - 14 results

       More magazine Results: 1-10 11-14 >>  
 
1.
Security Barriers: Dodging the Bullet
Magazine article by Sharon Durst; Security Management, Vol. 40, October 1996
Subjects: Crime prevention--Equipment and supplies, Industries--Safety and security measures, Industry--Safety and security measures, Polycarbonate sheet, Polycarbonates--Usage, Safety glass--Usage, Security systems industry--Product information
...glass or plastic (such as acrylic or polycarbonate). Composites include mixtures of...are on the market today: acrylic and polycarbonate. Both come in a variety of thicknesses...windows are monolithic, unlike glass and polycarbonate windows--which are laminates that...
2.
Time for Security to Bite the Bullet
Magazine article by Mark Oakes; Security Management, Vol. 37, July 1993
Subjects: Industries--Safety and security measures, Industry--Safety and security measures, Security systems--Standards
...Glass-clad polycarbonates are assemblies of glass, polycarbonate, and polyurethane...Laminated polycarbonates are product assemblies of polycarbonate and interlayers...laminated polycarbonates. Replaceable...glass-clad polycarbonate or laminated...
3.
Buyers' Guide of Correctional Products and Services
Magazine article; Corrections Today, Vol. 64, July 2002
Subjects: Construction industry--Services, Correctional institutions--Equipment and supplies, Electronic locking devices--Products, Electronic security systems--Products, Facility management--Services, Personal identification products industry--Products
...glass laminates, glass-clad polycarbonates and laminated polycarbonates. Oldcastle products are tested...of all-glass, glass-clad polycarbonates, security glass and laminated polycarbonate systems designed to defeat your...
4.
Innovations in Architectural Technology
Magazine article by Peter McCleary; Phi Kappa Phi Forum, Vol. 83, Summer 2003
Subjects: Architecture, Innovations, Technological change
...skins of aluminum, titanium, and polycarbonates; this new millennium began with a...replaced by organic chemistrys fusions (polycarbonates) and composites (carbon fiber and...textiles and linear ropes, in steel or polycarbonate, have become one of the preferred...
5.
That Was the Year That Was - Patents, 2002
Magazine article by Nancy Lambert; Searcher, Vol. 11, April 2003
Subjects: Business conditions, Chemical Abstracts Service, Derwent Information Ltd, Dialog Corp, Government agencies, Manycompanies, Online information services, Patents, Product lines, Questel-Orbit Inc, STN International, Service introduction, United States
...will generate all the other Registry Numbers for the same polymer. This process works for polyesters, polythioesters, polycarbonates, and polyamides. At the August ACS meeting in Boston, CAS announced the 2002 version of SciFinder, its desktop access...
More magazine Results: 1-10 11-14 >>

Top...
 

newspaper articles on: Polycarbonates  - 8 results

       More newspaper Results: 1-8 >>  
 
1.
Debate Escalates over Chemical in Plastic Bottles, Cans
Newspaper article; The Register-Guard (Eugene, OR), December 20, 2007
Subjects: Plastic containers--Health aspects, Plastic products--Health aspects, Plastics--Health aspects, Polycarbonates--Health aspects
...posed by a chemical used to make the polycarbonate bottles, but recent separate decisions...bisphenol A, used in the production of polycarbonate plastics. BPA is everywhere: In addition...suit, saying it would stop selling polycarbonate bottles at its 57 stores in North America...
2.
'Gender-Bending' Fear over Plastic Bottles
Newspaper article; The Daily Mail (London, England), May 22, 2009
Subjects: Bisphenol-A, Plastic containers, Plastic products, Plastics, Polycarbonates
...participants who drank for a week from polycarbonate bottles showed a 69 per cent increase...exposure. They were then given two polycarbonate bottles and asked to drink all cold...found that drinking cold liquids from polycarbonate bottles for just one week increased...
3.
Low Calibre of Welsh Cabinet
Newspaper article; South Wales Echo (Cardiff, Wales), October 18, 2007
Subjects: Polycarbonates
4.
Buyers Complain as New iPod Nano 'Damages Easily'
Newspaper article; The Evening Standard (London, England), September 26, 2005
...nano is way too expensive to scratch so easily like this." Apple says the screen, which displays pictures and album covers, is made of the toughest polycarbonates but stores will examine requests for returns of damaged players.
5.
Letters in the Editor's Mailbag
Newspaper article; The Register-Guard (Eugene, OR), June 23, 2007
...The issue is truly not "glass or plastic." What "environmental health advocates recommend" has little to do with polycarbonates, polyethylenes or poly-anythings. The truly environmentally sound container for the perfect infant nourishment is soft...
More newspaper Results: 1-8 >>

Top...
 

encyclopedia articles on: Polycarbonates  - 3 results

 
 
1.
Polycarbonates
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
POLYCARBONATES group of clear, thermoplastic polymers...molding compounds (see plastic ). Polycarbonates are prepared by the reaction of an...carbonate. The commercially important polycarbonates use 2,2-bis (4-hydroxyphenol...
2.
Polymer
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...that of the monomer or monomers because of the splitting off of water or some other substance, e.g., polyesters and polycarbonates (see illustration). Many polymers occur in nature, such as silk, cellulose , natural rubber , and proteins . In addition...
3.
Plastic
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...become cross-linked, thus preventing any slippage if heat and pressure are reapplied. See epoxy resins ; polyacrylics ; polycarbonates ; polyethylene ; polyolefins ; polypropylene ; polystyrene ; polyurethanes ; polyvinyl chloride ; vinyl plastics . Molding...


Top...
 About Questia   ::   Privacy   ::   Contact