外文翻譯--聚四氟乙烯堪稱塑料王

1、Teflon can be rated as the plastic kingTeflon [PTFE , F4] is to be able to bear one of corrosion function the best material in the world nowadays .Get the “plastic king“ laudatory title therefore .Chemistry medium uses i

2、ts energy over a long period of time in any kind, its many problem of creation fields such as chemical industry , petroleum , pharmacy having resolved our country. Teflon sealing element , washer , pad. The teflon sealin

3、g element , pad , seal washer are that the model moulds treating select and use suspension polymerization teflon resin be made from. Teflon and plastic is compared with each other other have be able to bear the chemistry

4、 corrosion and be able to bear the outstanding characteristic of temperature, it is encapsulant and filling material already quilt applying broadly.Teflon molecular formula teflon is four fluorine ethenes polymers. Engli

5、sh abbreviation is PTFE. The commodity is called “Teflon “ (teflon). “King of being plastic“ by good reputation. Teflon basic structure is. -CF2- CF2- CF2- CF2- CF2- CF2- CF2- CF2- CF2- CF2. Teflon applies to need the an

6、tiacid alkali and organic various menstruum's broadly, its self one of the raw material not having toxicity to person, but being put into use in procedure of production satisfies the bitter fluorine ammonium (PFOA) b

7、eing considered may have a carcinogenesis. Teflon (Teflon or PTFE) , popular name “plastic king “, Chinese commodity “iron fluorine dragon “ “, exceptional fluorine dragon “ “, “Tefulong“ “, Thailand fluorine dragon “ et

8、c.It is accomplished because four fluorine ethene classics get together high polymer , have the good chemistry stability , is able to bear corrosivity , hermetic sealing , high lubrication the viscidity , electricity ins

9、ulation and fine resisting do not age endurance. The long range works under the temperature being able to in 250 ℃ + till 180 ℃-, except six-zone-pass metal sodium and the liquid fluorine, ability other all chemicals, bo

10、il in chloroazotic acid getting change neither. Being used as engineering plastics , may manufacture the teflon tube , stick , belt , board , film and so on. Apply to function demanding the pipeline , container , pump ,

11、valve that higher being able to bear corrodes and making the radar , high frequency communication equipment and material , radio equipment and material and so on in general. Antisepsis picture preparing metal , glass , e

12、arthenware surface waits for the insulation dipping liquid dispersing various liquid work material available tier. Various gathering four fluorine circles , gathering four fluorine pads , gathering four fluorines checkin

13、g root and so on is used for preservative pipeline flange of all kinds Relatively molecular big , low teflon mass being in number one hundred thousand, high reaching more than 10 million, general be in number million (po

14、lymerization degree are in 104 order of magnitude, but polyethylene is in 103 only). General crystal degree is 90 ~ 95%, the six-zone-pass temperature is 327 ~ 342 ℃. . The CF2 element has arranged according to sawtooth

15、form in teflon molecule , comparatively, the hydrogen has faced slightly greatly, therefore the adjacent CF2 element can not choose completely according to opposing style alternating, but the warping chain , fluorine ato

16、m being to form a heliciform have almost covered entire high polymer chain surface because of fluorine atom radius 。This molecular structure has made an explanation various teflon function. Helix forming 13/6 when the te

17、mperature is lower than 19 ℃,; Untwisting, forms 15/7 a bit in 19 ℃ occurrence phase transitions , molecules helix. 346.94 and 484.88 kJ／mol, but teflon depolymerization generates 1 mol four fluorines ethenes though the

18、carbon- carbon key and carbon- fluorine key fracture need to absorb an energy respectively in entire fluorine carbon compound needing an energy only 171.38 kJ. Therefore during the period of high temperature splitting de

19、composition, main depolymerization of teflon is four fluorine ethenes。The teflon weightlessness rate (%) during the period of 260 , 370 and 420 ℃ is 1 X 10-3 10-4 , 4 X sums every time hour respectively 9 X 10-2. It can

20、be seen that teflon may be put into use in 260 ℃ long ranges. Since subsidiary outcome producing daedly poison time high temperature splitting decomposition protects and guards against teflon therefore fluorine phosgene

21、and different butylene of entire fluorine etc., being going to pay attention to safety specially contact naked light. Teflon keeps the good Mechanics function without exception within 196 ~ 260 ℃'s broader temperatur

22、e range- , one of entire fluorine carbon high polymer characteristic are invariable in the low temperature fragile.Be able to bear the chemistry corrosion and be able to bear the alkali metal outside , teflon waiting for

23、 nature getting rid of six-zone-pass being corroded hardly by any chemical reagent. The for example is in oil of vitriol , hydrogen nitrate , chlorhydric acid , boil even in chloroazotic acid, whose weight and the functi

24、on nothing change equal, are insoluble in all menstruum also nearly , dissolve in entire alkane slightly above 300 ℃ (about 0.1 g／100g). Teflon not attracting tide , not burning, the equal pole stabilizes to oxygen , the