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Teflon stick tetrafluoroethylene membrane price, Beichen District tetrafluoroethylene film, Tianjin three
Information Name: | Teflon stick tetrafluoroethylene membrane price, Beichen District tetrafluoroethylene film, Tianjin three |
Published: | 2014-11-10 |
Validity: | 0 |
Specifications: | Any |
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Price Description: | |
Detailed Product Description: | Teflon stick tetrafluoroethylene membrane price, Beichen District tetrafluoroethylene film, provided by Tianjin Tianjin Three Three plastic Limited. Three Plastic Co., Ltd. of Tianjin (www.tjzssj.com) is specialized in the "nylon, PTFE, plastic, insulation materials," the business, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Manager Zhou. - (CF2-CF2) n- belongs polymer: polytetrafluoroethylene (PTFE) relative molecular mass greater low hundreds of thousands, up to ten million higher than Teflon plate processing tetrafluoroethylene membrane, usually Millions (degree of polymerization of the order of 104, 103 only for polyethylene). Usually the degree of crystallinity of 90 to 95%, a melting temperature of 327 ~ 342 ℃. PTFE molecule CF2 units arranged in a zigzag shape, due to the fluorine atom radius slightly larger than that of hydrogen, so the adjacent CF2 units can not exactly stick Teflon trans cross oriented tetrafluoroethylene membrane price, but the formation of a spiral The twisted chain tetrafluoroethylene sets tetrafluoroethylene tube tetrafluoroethylene film, a fluorine atom, covering almost the entire surface of the polymer chain. This explains the various properties of the molecular structure of PTFE. When the temperature is below 19 ℃, 13/6 helix formation; phase transition occurs at 19 ℃, molecular slightly untied 15/7 helix formation. Although carbon perfluorocarbon compounds - carbon bonds and carbon - fluorine bond rupture were needed to absorb energy 346.94 and 484.88kJ / mol, but only 1mol polytetrafluoroethylene depolymerization generate energy 171.38kJ tetrafluoroethylene. Therefore, when the high-temperature pyrolysis, the depolymerization main polytetrafluoroethylene is tetrafluoroethylene. Polytetrafluoroethylene 260,370 and 420 ℃ when weight loss rate (%), respectively, and 1 × 10-4,4 × 10-3 9 × 10-2 per hour. Seen at 260 ℃ PTFE can be long-term use. Because produce toxic byproducts pyrolysis Shihai fluorine perfluoroisobutylene phosgene and so on, so pay special attention to safety and to prevent contact with open flames polytetrafluoroethylene. Tetrafluoroethane pad at temperatures below -185 ℃. PTFE gaskets become brittle. Pure PTFE sealing gasket is a clean product, will not form any contaminated material in contact, can be widely used in food, pharmaceutical and other industries by mechanical turning or cutting from the flat washer , V-shaped gasket, piston rings, ball washers, etc. have corrosion, aging-resistant and non-conductive and other good characteristics. |
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Copyright © GuangDong ICP No. 10089450, Three Plastic Co., Ltd. in Tianjin All rights reserved.
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You are the 25469 visitor
Copyright © GuangDong ICP No. 10089450, Three Plastic Co., Ltd. in Tianjin All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility