Polycarbonate-聚碳酸酯-英语特性及其应用

1、tt Characteristics and application of Polycarbonate主讲人：杨崇岭Words and Expressionsopticallyptkl adv. 眼睛地，视力地 trademarktredm:k n. （注册）商标;特征，标记 makrolon聚碳酸酯hammer glass锤玻璃 durable耐用的scratch-resistance耐划伤性transmissiontrnsmn n. 传送;播送;（电台或电视）信息;传动装置 Words and Expressionsassembly sembli n. 装配;集会;议会;立法机构 auto

2、mobile :tmbi:l n. 汽车 v. 开汽车，坐汽车 machinery mi:nri n. （总称）机器;机械装置 leisure le(r) n. 闲暇;安逸 adj. 闲暇的;空闲的laminate层压材料embassies大使馆detention拘留be widely used in被广泛应用于1BackgroundPolycarbonates are a group of thermoplastic,it containing carbonate groups in their chemical structures. Polycarbonates used in engi

3、neering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Polycarbonate is also known by a variety of trademarked names, including Lexan, Makrolon, Hammer glass and others.2StructurePolycarbonates received their name because the

4、y are polymers containing carbonate groups (O(C=O)O). A balance of useful features, including temperature resistance, impact resistance and optical properties, positions polycarbonates between commodity plastics and engineering plastics.3PropertiesPolycarbonate is a durable material. Although it has

5、 high impact-resistance, it has low scratch-resistance. Therefore, a hard coating is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive components. The characteristics of polycarbonate compare to those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is strong

6、er and will hold up longer to extreme temperature. Polycarbonate is highly transparent to visible light, with better light transmission than many kinds of glass.5ApplicationThree applications of PC engineering plastics glass assembly and automobile industry and electronic industry, followed by indus

7、trial machinery parts, CD, packaging, computers and other office equipment, medical and health care, film, leisure and protective equipment etc.Polycarbonates do not have a unique resin identification code (RIC) and are identified as Other, 7 on the RIC list. Products made from polycarbonate can contain the precursor monomer bisphenol A (BPA).5Application PC can be used as door and window glass, PC laminate is widely used in banks, embassies, detention centers and public places of the