外文翻译--聚四氟乙烯堪称塑料王.doc_第1页
外文翻译--聚四氟乙烯堪称塑料王.doc_第2页
外文翻译--聚四氟乙烯堪称塑料王.doc_第3页
外文翻译--聚四氟乙烯堪称塑料王.doc_第4页
外文翻译--聚四氟乙烯堪称塑料王.doc_第5页
已阅读5页,还剩5页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

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

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论