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Lexan

Not all synthetic polymers are used as fibers Mylar for example is chemically the same as Dacron but IS prepared in the form of a thin film instead of a fiber Lexan is a polyester which because of its impact resistance is used as a shatterproof substitute for glass It IS a polycarbonate having the structure shown... [Pg.869]

Fig. 5.2 Type III isotherms, (a) n-hexane on PTFE at 25°C (b) n-octane on PTFE at 20 C (c) water on polymethylmethacrylate at 20°C (d) water on bis(A-polycarbonate) (Lexan) at 20°C. The insets in (c) and (d) give the curves of heat of adsorption against fractional coverage the horizontal line marks the molar heat of liquefaction. (Redrawn from diagrams in the original papers, with omission of experimental points.)... Fig. 5.2 Type III isotherms, (a) n-hexane on PTFE at 25°C (b) n-octane on PTFE at 20 C (c) water on polymethylmethacrylate at 20°C (d) water on bis(A-polycarbonate) (Lexan) at 20°C. The insets in (c) and (d) give the curves of heat of adsorption against fractional coverage the horizontal line marks the molar heat of liquefaction. (Redrawn from diagrams in the original papers, with omission of experimental points.)...
Lewis-Randall rule Lewis relation Lewmet 55 Lexan... [Pg.563]

Lexan resins Lexomil Lexo tan Lexotanil LEXPAT... [Pg.564]

Polycarbonates are an unusual and extremely useful class of polymers. The vast majority of polycarbonates are based on bisphenol A [80-05-7] (BPA) and sold under the trade names Lexan (GE), Makrolon (Bayer), CaUbre (Dow), and Panlite (Idemitsu). BPA polycarbonates [25037-45-0] having glass-transition temperatures in the range of 145—155°C, are widely regarded for optical clarity and exceptional impact resistance and ductiUty at room temperature and below. Other properties, such as modulus, dielectric strength, or tensile strength are comparable to other amorphous thermoplastics at similar temperatures below their respective glass-transition temperatures, T. Whereas below their Ts most amorphous polymers are stiff and britde, polycarbonates retain their ductiUty. [Pg.278]

Table 1. Molecular Weight and Viscosity of Lexan Resins... Table 1. Molecular Weight and Viscosity of Lexan Resins...
Fig. 6. Melt viscosity dependence on shear rate for various polymers A, low density polyethylene at 210°C B, polystyrene at 200°C C, UDEL P-1700 polysulfone at 360°C D, LEXAN 104 polycarbonate at 315°C and E, RADEL A-300 polyethersulfone at 380°C. Fig. 6. Melt viscosity dependence on shear rate for various polymers A, low density polyethylene at 210°C B, polystyrene at 200°C C, UDEL P-1700 polysulfone at 360°C D, LEXAN 104 polycarbonate at 315°C and E, RADEL A-300 polyethersulfone at 380°C.
Property ASTM method Lexan 101 Medon 8320"- Lexan 470l "- ... [Pg.270]

General Electric Company (U.S.A.), Lexan Polycarbonate—Design... [Pg.204]

Today about 75% of the market is held by General Electric and Bayer with their products Lexan and Makrolon respectively. Other manufacturers are ANIC (Italy), Taijin Chemical Co., Mitsubishi Edogawa and Idemitsu Kasei in Japan and, since 1985, Dow (USA) and Policarbonatos do Brasil (Brazil). Whilst this market is dominated by bis-phenol A polycarbonates, recent important developments include alloys with other thermoplastics, polyester carbonates and silicone-polycarbonate block copolymers. [Pg.557]

Lexan, a polycarbonate prepared from diphenyl carbonate and bisphenol A, is another commercially valuable polyester. Lexan has an unusually high impact strength, making it valuable for use in telephones, bicycle safety helmets, and laptop computer cases. [Pg.820]

Leuprolide, structure of, 1056 I.evorotatory, 295 Lewis, Gilbert Newton. 8 Lewis acid, 57-58 examples of, 58 reactions of, 57-58 Lewis base, 57, 59-60 examples of, 59 reactions of, 59-60 Lewis structure, 9 resonance and, 43 Lexan, structure and uses of, 819,... [Pg.1303]

Lexan is a very rugged polyester in which the monomers can be taken to be carbonic add, HO—C—OH,... [Pg.631]

Write the structure of Lexan. Show at least two complete repeat units of the pol Tner. [Pg.912]

Diphenylcarbonate (DPC) is a key monomer for producing LEXAN polycarbonate resin by melt polymerization reaction of DPC with Bisphenol A. Currently, DPC is produced by General Electric Company (GE) in Cartagena, Spain, using a two-step process (Eq. 1) The stoichiometric carbonylation of... [Pg.185]

FIGURE 16.6 Schematic of the clear flow gating interface. The interface was constructed in-house from a 1 in. diameter, 0.5 in. thick Lexan disk. The disk is clear, which allows direct observation of the capillaries in the stream of flush buffer. The capillaries are sleeved in 0.0625 in. o.d. Teflon tubing and this tubing is held in place by Lite Touch fittings (not shown). The cross-flow of buffer prevents LC effluent from electromigrating onto the CZE capillary until an injection is desired (reprinted with permission from Analytical Chemistry). [Pg.374]

Ten mil Lexarf PC film containing no UV-stabil izers was obtained from Sheet Products Section, Mt. Vernon, Indiana. Reference films containing various additives were prepared by dissolving the additive and Lexan PC resin in dichloromethane and casting films from solutions containing about 5% solids. [Pg.99]

Lexan is a registered trademark of the General Electric Company. [Pg.99]

General Electric markets the polycarbonate of bisphenol A as Lexan.W Similar bisphenol A polycarbonate sheets are marketed by Rohm and Haas as the product TuffakJ2]... [Pg.217]

Material Safety Data Sheet, Lexan Resin. Plastixs, LLC, http //www.plastixs.com/pdfs/msds/41412N.pdf... [Pg.219]

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