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- home > Supply > PTFE turning plate tetrafluoroethane pad, Guang'an tetrafluoroethane pad, Tianjin three
Information Name: | PTFE turning plate tetrafluoroethane pad, Guang'an tetrafluoroethane pad, Tianjin three |
Published: | 2014-12-26 |
Validity: | 0 |
Specifications: | Limited |
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Detailed Product Description: | - (CF2-CF2) n- belong polymer: polytetrafluoroethylene (PTFE) is relatively large molecular weight, low hundreds of thousands, a high of more than ten million, generally millions (degree of polymerization at 104 order of magnitude, but only in the polyethylene 103). Degree of crystallinity is generally 90 to 95% polytetrafluoroethylene turning plate tetrafluoroethane pad, a melting temperature of 327 ~ 342 ℃. PTFE molecule CF2 unit arranged by zigzag shape, due to hydrogen fluoride is slightly larger than the atomic radius, so adjacent CF2 units can not cross exactly trans orientation Teflon sleeve tetrafluoroethane pad, but the formation of a spiral twisted chain, a fluorine atom, covering almost the entire surface of the polymer chain. This molecular structure explains the various properties of PTFE. When the temperature is below 19 ℃, the formation of 13/6 helix; phase transition occurs at 19 ℃, molecular slightly untied, 15/7 helix formation. Although carbon perfluorocarbon compounds - carbon bond and carbon - fluorine bond breaking require energy absorption 346.94 respectively and 484.88kJ / mol, but only PTFE depolymerization generate energy 171.38kJ 1mol tetrafluoroethylene. Therefore, when pyrolysis, polytetrafluoroethylene main depolymerization is tetrafluoroethylene. Polytetrafluoroethylene at 260,370 and 420 ℃ when the weight loss rate (%), respectively, and 1 × 10-4,4 × 10-3 9 × 10-2 per hour. Seen at 260 ℃ long Teflon can be used. Due to the high temperature pyrolysis Shihai toxic byproducts phosgene and fluorine perfluoroisobutylene etc., so pay special attention to safety and to prevent PTFE expose to flame. Polytetrafluoroethylene [PTFE tetrafluoroethane pad, F4] is one of the best material for corrosion resistance can be in today's world, so too "plastic" reputation. Teflon is tetrafluoroethylene polymer, the abbreviation of PTFE Teflon plate rod tube tetrafluoroethane pad, the trade name "Teflon." PTFE is widely used in a variety of anti-acid and organic solvents need a place, which itself is not toxic to people, but one of the raw materials used in the production process of ammonium perfluorooctanoate (PFOA) is considered likely to have carcinogenic effects. Long-term work at a temperature of + 250 ℃ to -180 ℃ under, in addition to the molten metal and liquid sodium fluoride, the ability of all other chemicals. PTFE turning plate tetrafluoroethane pad, Guang'an tetrafluoroethane pad, Tianjin Tianjin three by three plastic Limited. Three Plastic Co., Ltd. Tianjin (www.tjzssj.com) strong, credible, in Tianjin plastic plate (sheet, section), rods and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Tianjin three and you work into the brilliant, for a better future! |
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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