外文翻译--聚四氟乙烯堪称塑料王.doc

TefloncanberatedastheplastickingTeflonPTFE,F4istobeabletobearoneofcorrosionfunctionthebestmaterialintheworldnowadays.Gettheplastickinglaudatorytitletherefore.Chemistrymediumusesitsenergyoveralongperiodoftimeinanykind,itsmanyproblemofcreationfieldssuchaschemicalindustry,petroleum,pharmacyhavingresolvedourcountry.Teflonsealingelement,washer,pad.Theteflonsealingelement,pad,sealwasherarethatthemodelmouldstreatingselectandusesuspensionpolymerizationteflonresinbemadefrom.Teflonandplasticiscomparedwitheachotherotherhavebeabletobearthechemistrycorrosionandbeabletobeartheoutstandingcharacteristicoftemperature,itisencapsulantandfillingmaterialalreadyquiltapplyingbroadly.Teflonmolecularformulateflonisfourfluorineethenespolymers.EnglishabbreviationisPTFE.ThecommodityiscalledTeflon(teflon).Kingofbeingplasticbygoodreputation.Teflonbasicstructureis.-CF2-CF2-CF2-CF2-CF2-CF2-CF2-CF2-CF2-CF2.Teflonappliestoneedtheantiacidalkaliandorganicvariousmenstruumsbroadly,itsselfoneoftherawmaterialnothavingtoxicitytoperson,butbeingputintouseinprocedureofproductionsatisfiesthebitterfluorineammonium(PFOA)beingconsideredmayhaveacarcinogenesis.Teflon(TeflonorPTFE),popularnameplasticking,Chinesecommodityironfluorinedragon,exceptionalfluorinedragon,Tefulong,Thailandfluorinedragonetc.Itisaccomplishedbecausefourfluorineetheneclassicsgettogetherhighpolymer,havethegoodchemistrystability,isabletobearcorrosivity,hermeticsealing,highlubricationtheviscidity,electricityinsulationandfineresistingdonotageendurance.Thelongrangeworksunderthetemperaturebeingabletoin250+till180-,exceptsix-zone-passmetalsodiumandtheliquidfluorine,abilityotherallchemicals,boilinchloroazoticacidgettingchangeneither.Beingusedasengineeringplastics,maymanufacturetheteflontube,stick,belt,board,filmandsoon.Applytofunctiondemandingthepipeline,container,pump,valvethathigherbeingabletobearcorrodesandmakingtheradar,highfrequencycommunicationequipmentandmaterial,radioequipmentandmaterialandsooningeneral.Antisepsispicturepreparingmetal,glass,earthenwaresurfacewaitsfortheinsulationdippingliquiddispersingvariousliquidworkmaterialavailabletier.Variousgatheringfourfluorinecircles,gatheringfourfluorinepads,gatheringfourfluorinescheckingrootandsoonisusedforpreservativepipelineflangeofallkindshermeticsealingbroadly.Canbeusedtoreeloffrawsilkfromcocoonsbesides,also,teflonfibrefluorinesilktassel(abroadthecommodityiscalledexceptionalfluorinesilktassel).Atpresent,variousclassifiedcollectionstetrafluoroethyleneproductalready,inthechemicalindustry,themachinery,theelectron,theelectricappliance,thewarindustry,astronautics,thelinkguaranteedwithnationaleconomydomainsinandsoonbridgeplaythepivotalrole.Theteflon(PTFE)exploitationconditionsprofessionchemicalindustry,thepetrochemical,therefinery,thechlorinealkali,thesystemacid,thephosphatefertilizer,thedrugsmanufacture,theagriculturalchemicals,thechemicalfiber,influence,thecoking,thecoalgas,theorganicsynthesis,coloredsmelting,thesteelandiron,theatomicenergyandthehighnetproductproduction(forexampleionicmembraneelectrolysis),sticksthethickmaterialhandlingandtheoperation,hygienicprocessingProductiondepartmentsandsoonrequesthighlystrictfood,drink.Mediumhydrofluoricacid,phosphoricacid,sulfuricacid,hydrogennitrate,chlorhydricacid,variousorganicacid,organicsolvent,strongoxidantandotherstrongvariouscorrosivitychemistrymedium.Ortemperature-20250,allowstheshockchillingshockheating,coldhotalternativeoperation0.16.4Mpa(satisfypressure-shoulderingpressuretill64kgf/cm2)-0.16.4Mpa(Fullvacuato64kgf/cm2Teflon(PTFE)usesmeritThethermostabilityusestheworkingtemperaturetoamountto250.Beabletobearthelowtemperaturehavingfinemachinerytenacity；Evenifthetemperaturecomesdownto196-,maykeep5%selongationrate.Beabletobearcorrosionshowingtheinertia,abilitytogreatmajoritychemicalsandmenstruum,strongacidstrongbase,waterandvariousorganicsolvent.Beabletobeartheclimatethelife-spanageinghavingplasticmiddlebestHighlubricationisthatsolidmaterialishitbyfrictioncoefficientsminimumpersonNotgluingisthatminimalsurfacetension,doesnotglueanymatterinsolidmaterial.Inertiathenothingispoisonedhavingphysiology,theinnerhasnobadreactionasthemanpowerbloodvesselandthevisceralorganlongrangeimplantationbody.Relativelymolecularbig,lowteflonmassbeinginnumberonehundredthousand,highreachingmorethan10million,generalbeinnumbermillion(polymerizationdegreearein104orderofmagnitude,butpolyethyleneisin103only).Generalcrystaldegreeis9095%,thesix-zone-passtemperatureis327342.TheCF2elementhasarrangedaccordingtosawtoothforminteflonmolecule,comparatively,thehydrogenhasfacedslightlygreatly,thereforetheadjacentCF2elementcannotchoosecompletelyaccordingtoopposingstylealternating,butthewarpingchain,fluorineatombeingtoformaheliciformhavealmostcoveredentirehighpolymerchainsurfacebecauseoffluorineatomradius。Thismolecularstructurehasmadeanexplanationvariousteflonfunction.Helixforming13/6whenthetemperatureislowerthan19,；Untwisting,forms15/7abitin19occurrencephasetransitions,moleculeshelix.346.94and484.88kJmol,butteflondepolymerizationgenerates1molfourfluorinesethenesthoughthecarbon-carbonkeyandcarbon-fluorinekeyfractureneedtoabsorbanenergyrespectivelyinentirefluorinecarboncompoundneedinganenergyonly171.38kJ.Thereforeduringtheperiodofhightemperaturesplittingdecomposition,maindepolymerizationofteflonisfourfluorineethenes。Theteflonweightlessnessrate(%)duringtheperiodof260,370and420is1X10-310-4,4Xsumseverytimehourrespectively9X10-2.Itcanbeseenthatteflonmaybeputintousein260longranges.Sincesubsidiaryoutcomeproducingdaedlypoisontimehightemperaturesplittingdecompositionprotectsandguardsagainstteflonthereforefluorinephosgeneanddifferentbutyleneofentirefluorineetc.,beinggoingtopayattentiontosafetyspeciallycontactnakedlight.TeflonkeepsthegoodMechanicsfunctionwithoutexceptionwithin196260sbroadertemperaturerange-,oneofentirefluorinecarbonhighpolymercharacteristicareinvariableinthelowtemperaturefragile.Beabletobearthechemistrycorrosionandbeabletobearthealkalimetaloutside,teflonwaitingfornaturegettingridofsix-zone-passbeingcorrodedhardlybyanychemicalreagent.Theforexampleisinoilofvitriol,hydrogennitrate,chlorhydricacid,boileveninchloroazoticacid,whoseweightandthefunctionnothingchangeequal,areinsolubleinallmenstruumalsonearly,dissolveinentirealkaneslightlyabove300(about0.1g100g).Teflonnotattractingtide,notburning,theequalpolestabilizestooxygen,theultravioletray,waitfornaturethereforehavingoutstandingbeingabletobear.Boththeelectricityfunctionteflondielectricconstantwithinbroaderfrequencyrangeanddielectricspoilagehangdownverymuch,andpuncturevoltage,volumeresistivityandbeabletobearanelectricarcallcomparativelyhighly.Beingabletobearbeingabletobearradiationfunctionteflontheradiationfunctionisrelativelypoor(104pullsmorals),arousedegradationafteracceptinghigh-energyradiation,highpolymerelectricityfunctionandMechanicsfunctioncomedownwithoutexceptionobviously.Polymerizationtefloncomesintobeingbecausefourfluorineethenesgettogetherafterthefreeradical.Upperindustrypolymerizationreactionistostirgoalongs,usereactionheatindispersingunderlargeamountofwaterexistence,easytocontrolthetemperatureand.Bein40likegettingtogether80,3isinprogress26,000gramsstrenuously/centimetreunder2pressure,inorganicfaultsulfate,organichyperoxideavailablearetoinitiateanagent,alsocanuseoxidetorestoreinitiatingsystem.Everyfourmoleoffluorinesethenesgiveoffheatwhengettingtogether171.38kJ.Dispersethesurfaceactivitydosegettingtogethermustaddentirefluorinetype,forexampleentirefluorinesadnessorwhosesalt.Applyteflonbutadoptthemoldingcompressingorforcingouttreating；Alsomaymanufacturewaterdispersingliquid,beusedforcoating,besteepedfibreinwaterorbemanufactured.Teflonisusedasthematerialbeingabletobearthehighlowtemperature,beingabletobearcorrosionmaterial