
Polycarbonates are a particular group of thermoplastics. They are easily worked, injection moulding, and thermoforming; as such, these plastics are very widely used in modern manufacturing. They are called polycarbonates because they are polymers having monomers groups linked together by carbonate groups (-O-CO-O-) in a long molecular chain. The most common type of polycarbonate plastic is one made from Bisphenol A, where groups from Bisphenol A are linked together by carbonate groups in a polymer chain. This polycarbonate is a very durable material, and can be laminated to make bullet-proof glass, though “bullet-resistant” would be more accurate. The characteristics of polycarbonate are quite like those of polymethyl methacrylate (''Polymethyl methacrylate''), but polycarbonate is stronger and thus more expensive. This polymer is mainly Transparency and has better light transmission characteristics than glasses. Polycarbonate has : *a density of 1.20 g/cm3 *a use range from -100Celsius to +135Celsius *a melting point around 250Celsius *a refractive index equal to 1.585 ± 0.001 *a light transmission index equal to 90% ± 1% Polycarbonate is becoming more common in housewares as well as laboratories and in industry. It is often used to create protective features, for example in banks as well as vandal-proof windows and lighting lenses for many buildings. Other products made from polycarbonate include sunglass/eyeglass lenses, compact discs and DVDs. It is the major component of one variety of Nalgene bottles. Lexan is the registered trademark for polycarbonate plastic manufactured (from Bisphenol A) by General Electric. MERLON® is the registered trademark used by the Mobay Chemical Company. ==Synthesis== Polycarbonate can be synthesized from bisphenol A and phosgene (carbonyl dichloride, COCl2). The first step in the synthesis of polycarbonate from bisphenol A is treatment of bisphenol A with sodium hydroxide. This deprotonates the hydroxyl groups of the bisphenol A molecule.
==Most widely used polycarbonate== An anonymous editor just eliminated the following text: ''The most widely used industrial polycarbonate is bisphenol A, and sometimes the general term “polycarbonate” is used synonymously with this particular chemical.'' Now I don't know enough about polycarbonates to say whether or not this is a true statement, but I always get worried when someone comes along and makes a change like this without even leaving us a comment in the audit trail. Does anyone know whether this statement was true (and should terefore be reverted back into the article)? User:Atlant 19:33, 10 Feb 2005 (UTC)
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Words begining with Polycarbonate:
Polycarbonate
Polycarbonate
Polycarbonate
Polycarbonates are a particular group of thermoplastics. They are easily worked, injection moulding, and thermoforming; as such, these plastics are very widely used in modern manufacturing. They are called polycarbonates because they are polymers having monomers groups linked together by carbonate groups (-O-CO-O-) in a long molecular chain. The most common type of polycarbonate plastic is one made from Bisphenol A, where groups from Bisphenol A are linked together by carbonate groups in a polymer chain. This polycarbonate is a very durable material, and can be laminated to make bullet-proof glass, though “bullet-resistant” would be more accurate. The characteristics of polycarbonate are quite like those of polymethyl methacrylate (''Polymethyl methacrylate''), but polycarbonate is stronger and thus more expensive. This polymer is mainly Transparency and has better light transmission characteristics than glasses. Polycarbonate has : *a density of 1.20 g/cm3 *a use range from -100Celsius to +135Celsius *a melting point around 250Celsius *a refractive index equal to 1.585 ± 0.001 *a light transmission index equal to 90% ± 1% Polycarbonate is becoming more common in housewares as well as laboratories and in industry. It is often used to create protective features, for example in banks as well as vandal-proof windows and lighting lenses for many buildings. Other products made from polycarbonate include sunglass/eyeglass lenses, compact discs and DVDs. It is the major component of one variety of Nalgene bottles. Lexan is the registered trademark for polycarbonate plastic manufactured (from Bisphenol A) by General Electric. MERLON® is the registered trademark used by the Mobay Chemical Company. ==Synthesis== Polycarbonate can be synthesized from bisphenol A and phosgene (carbonyl dichloride, COCl2). The first step in the synthesis of polycarbonate from bisphenol A is treatment of bisphenol A with sodium hydroxide. This deprotonates the hydroxyl groups of the bisphenol A molecule.
Polycarbonate
==Most widely used polycarbonate== An anonymous editor just eliminated the following text: ''The most widely used industrial polycarbonate is bisphenol A, and sometimes the general term “polycarbonate” is used synonymously with this particular chemical.'' Now I don't know enough about polycarbonates to say whether or not this is a true statement, but I always get worried when someone comes along and makes a change like this without even leaving us a comment in the audit trail. Does anyone know whether this statement was true (and should terefore be reverted back into the article)? User:Atlant 19:33, 10 Feb 2005 (UTC)
See other meanings of words starting from letter:
P
PA | PB | PC | PD | PE | PF | PG | PH | PI | PJ | PK | PL | PM | PN | PO | PR | PS | PT | PU | PW | PX | PY | PZ |Words begining with Polycarbonate:
Polycarbonate
Polycarbonate
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