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| upper_working_temp = | lower_working_temp = | linear_expansion = 65–70 × 10−6/K | specific_heat = 1.2–1.3 kJ/(kg·K) | thermal_conductivity_note = at 23 °C | thermal_conductivity = 0.19–0.22 W/(m·K) | thermal_diffusivity_note = at 25 °C | thermal_diffusivity = 0.144 mm²/s | dielectric_constant_note = at 1 MHz | dielectric_constant = 2.9 | permittivity_note = at 1 MHz | permittivity = 2.568 × 10−11 F/m | relative_permeability_note = at 1 MHz | relative_permeability = 0.866(2) | permeability_note = at 1 MHz | permeability = 1.089(2) μN/A2 | dielectric_strength = 15–67 kV/mm | dissipation_factor_note = at 1 MHz | dissipation_factor = 0.01 | surface_resistivity = 1015 Ω/sq | volume_resistivity = 1012–1014 Ω·m | chem_res_acid_c = | chem_res_acid_d = | chem_res_alcohol = | chem_res_alkali = | chem_res_aromatic = | chem_res_grease_oil = | chem_res_haloalkane = | chem_res_halogen = | chem_res_ketone = | gas_perm_temp = 20 °C | gas_perm_N = 10 – 25 cm3·mm/(m2·day·Bar) | gas_perm_O = 70 – 130 cm3·mm/(m2·day·Bar) | gas_perm_CO2 = 400 – 800 cm3·mm/(m2·day·Bar) | gas_perm_H2O =1–2 gram·mm/(m2·day) @ 85%–0% RH gradient | price = 2.6 – 2.8 €/kg〔CES Edupack 2010, Polycarbonate (PC) specs sheet〕 | footnotes = }} Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many applications. Polycarbonates do not have a unique Resin identification code (RIC) and are identified as "Other", 7 on the RIC. Products made from polycarbonate can contain the precursor monomer bisphenol A (BPA). Polycarbonate is also known by a variety of trademarked names, including Lexan, Makrolon, and others. ==Structure== Polycarbonates received their name because they are polymers containing carbonate groups (–O–(C=O)–O–). A balance of useful features including temperature resistance, impact resistance and optical properties position polycarbonates between commodity plastics and engineering plastics. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「polycarbonate」の詳細全文を読む スポンサード リンク
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