Khoom Taw qhia
| Poly (tetrafluoroethylene) Cov ntaub ntawv yooj yim |
| Kev piav qhia Kev Npaj Siv |
| Khoom npe: | Poly (tetrafluoroethylene) |
| Synonyms: | PTFE poly (tetrafluoroethylene); Poly (tetrafluoroethylene), hmoov, 35 μm particle loj; Poly (tetrafloethylene); Cefral Lube - I Qib; Cefral Lube - V Qib; EK 1108GY-A; ek1108gy-a; Electrafil TR{{7} }/EC |
| CAS: | 9002-84-0 |
| MF: | (C2F4)n |
| MW: | 0 |
| EINECS: | 618-337-2 |
| Khoom Categories: | Polymers; Chromosorb; Ntim GC; Txhawb nqa; Fluorocarbons; Hydrophobic Polymers; Cov Khoom Siv Hluav Taws Xob; Polymer Science |
| Mol File: | 9002-84-0.mol |
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| Poly (tetrafluoroethylene) Chemical Properties |
| Melting point | 327 degree |
| Boiling point | 400 degree |
| ceev | 2.15 g / ml ntawm 25 degree |
| Refractive Index | 1.35 |
| cia temp. | Khaws ntawm -20 degree |
| solubility | Solubility hauv dej: |
| daim ntawv | hmoov |
| Specific Gravity | 2 |
| xim | dawb |
| tsw | ntawm 100.00?%. tsw tsw |
| Dej Solubility | Insoluble hauv dej. Soluble nyob rau hauv perfluoro kerosene. |
| Merck | 14,7562 |
| Dielectric tsis tu ncua | 2. 0(Ambient) |
| Kev ruaj ntseg: | Stable - unreactive nrog feem ntau cov ntaub ntawv. Incompatible nrog molten alkali hlau, fluorine thiab lwm yam halogens, muaj zog oxidizing neeg sawv cev. |
| IARC | 3 (Vol. 19, Sup 7) 1987 |
| NIST Chemistry Reference | Polytetrafluoroethylene, annealed (9002-84-0) |
| EPA Tshuaj Registry System | Polytetrafluoroethylene (9002-84-0) |
| Cov ntaub ntawv kev nyab xeeb |
| Hazard Codes | Xi, T, Xn |
| Risk Statements | 41-36/38-45-48/20 |
| Cov lus hais txog kev nyab xeeb | 26-39-24/25-45-22-53-23 |
| WGK Germany | 3 |
| RTECS | KX4025000 |
| Ceeb toom | Irritant |
| TSCA | Yog lawm |
| HS Code | 39046100 |
| Cov Ntaub Ntawv Muaj Xwm Ceev | 9002-84-0( Cov ntaub ntawv muaj phom sij) |
| MSDS Cov Ntaub Ntawv |
| Tus kws kho mob | Lus |
|---|---|
| Poly (tetrafluoroethylene) | Lus Askiv |
| ACROS | Lus Askiv |
| SigmaAldrich | Lus Askiv |
| ALFA | Lus Askiv |
| Poly (tetrafluoroethylene) Siv Thiab Synthesis |
| Kev piav qhia | Poly-(Tetrafluoroethylene) (PTFE, Hom Lub Npe: Teflon, Fluon, Hostaflon, thiab Polyflon) yog ib hom muaj zog, tawv, waxy thiab nonflammable hluavtaws cob. Nws cov qauv qauv yog [CF2-CF2]n nrog cov saw hlau txuas. Nws yog tsim los ntawm cov dawb radical polymerization ntawm tetrafluoroethylene. PTFE muaj nplua nto, siab melting point, thiab yog heev chemically inert. Cov cuab yeej no ua rau nws muaj ntau yam kev siv. Nws daim ntawv thov loj tshaj plaws yog rau kev xaim hauv aerospace thiab kev siv computer vim nws cov khoom zoo heev dielectric, xws li cov insulator hauv cables thiab connector. Hauv kev lag luam, PTFE tuaj yeem siv rau hauv qhov chaw uas yuav tsum tau ua haujlwm ntawm qhov zawv zawg vim nws tsis tshua muaj kev sib txhuam xws li cov bearings, lub zog thiab cov phaj swb. PTFE kuj tseem siv rau hauv kev tsim cov carbon fiber ntau thiab fiberglass composites. Tsis tas li ntawd, vim nws cov tshuaj inertia thiab siab thermal tsis kam, PTFE yog siv rau hauv qhov chaw uas siv cov kua qaub, alkalis lossis lwm yam tshuaj, xws li liner hauv cov yeeb nkab kab. |
| Kev npaj | Poly (tetrafluoroethylene) yog npaj los ntawm tetrafluoroethylene thiab muaj cov rov qab units nyob rau hauv ib tug feem ntau linear saw: F2C=CF2 --->[-CF2-CF2-]n Tetrafluoroethylene polymer muaj qhov qis tshaj coefficient ntawm kev sib txhuam ntawm cov khoom. Nws muaj cov tshuaj tiv thaiv zoo heev thiab tsis tshua muaj brittleness kub (100C). Nws qhov dielectric tsis tu ncua thiab qhov poob qis yog qhov qis thiab ruaj khov thoob plaws qhov kub thiab qhov ntau zaus. Nws lub zog cuam tshuam yog siab. |
| Cov ntaub ntawv | http://pslc.ws/macrog/ptfe.htm https://global.britannica.com/science/polytetrafluoroethylene https://en.wikipedia.org/wiki/Polytetrafluoroethylene#Lwm yam |
| Kev piav qhia | Tetrafl uoroethylene (TFE), tseem hu ua perfl uoroethylene, yog xim tsis muaj xim, fl ammable, toxic gas. Nws yog monomer siv rau polytetrafl uoroethylene (PTFE), uas yog muag nyob rau hauv lub DuPont tradename ntawm Tefl rau. TFE yog co-polymerized nrog lwm cov tebchaw los tsim ntau yam ntawm Teflons. TFE yog tsim los ntawm cua sov chlorodifl uoromethane (CHClF2, Freon-22) lossis trifl uoromethane (CHF3, Freon-23). TFE yog siv yuav luag tsuas yog ib tug monomer nyob rau hauv zus tau tej cov PTFE. PTFE yog vinyl polymer, uas txhais tau hais tias nws yog tsim los ntawm monomer nrog carbon-carbon ob daim ntawv cog lus. PTFE yog tsim los ntawm TFE los ntawm dawb radical polymerization. PTFE lub cev tshwj xeeb yog vim nws cov qauv tshuaj. PTFE muaj cov hlua ntev ntawm cov pa roj carbon atoms ncig los ntawm fluorine atoms. Cov fluorine atoms ua raws li kev tiv thaiv kev tiv thaiv uas tiv thaiv cov pa roj carbon-carbon daim ntawv cog lus los ntawm tshuaj tua kab mob. Cov fluorine atoms tawm tsam lwm cov atoms, ua rau nws nyuaj rau txhua yam los lo rau PTFE. PTFE resins muaj tsawg coeffi cients ntawm kev sib txhuam (< 0.1). The strong fluorine-to-carbon bonds and high electronegativity of fluorine make PTFE very stable. The long chains of PTFE pack closely together to give a dense crystalline solid. The packing, which can be compared to stacking boards, produces little cross-linking. |
| Chemical Properties | Polytetrafluoroethylene yog ib qho khoom dawb nrog lub ntsej muag zoo nkauj thiab hnov. Nws yog cov khoom siv tawv tawv ntawm lub zog tensile nruab nrab nrog kev nyiam nkag mus rau hauv compression.Cov khoom hluav taws xob rwb thaiv tsev yog qhov zoo heev thiab yuav luag zoo li cov polyethylene. Cov coefficient ntawm kev sib txhuam tsis tshua muaj qis thiab hais kom qis dua li ntawm lwm yam khoom; cov khoom tsis-stick kuj zoo heev. Polytetrafluoroethylene muaj qhov tshwj xeeb tiv thaiv tshuaj tua kab mob thiab yog inert rau txhua hom reagents tsuas yog molten alkali hlau thiab fluorine. Tsis muaj cov kuab tshuaj paub txog cov polymer, tab sis nws yog o los ntawm qee cov roj fluorocarbon ntawm qhov kub thiab txias mus txog qhov crystalline melting point; Lwm cov ntaub ntawv organic tsis txawm o ntawm cov polymer. Polytetrafluoroethylene muaj cov thermal stability siab thiab khaws nws cov khoom nyob rau hauv ntau qhov kub thiab txias. Cov khoom siv polymer tuaj yeem siv txog li 300 degree rau lub sijhawm ntev yam tsis muaj qhov poob ntawm lub zog thiab cov seem nyias nyias nyob twj ywm ntawm qhov kub thiab txias hauv qab -100 degree . Muaj qee qhov poob phaus thaum polytetrafluoroethylene yog rhuab saum toj no txog 200 degree tab sis qhov no me me txog li 350 degree. Cov polymer kuj muaj huab cua tiv thaiv zoo. |
| Chemical Properties | cov hmoov dawb, los yog cov khoom dawb nrog kev xav zoo |
| Keeb kwm | Daim ntawv polymerized ntawm TFE raug tshawb pom los ntawm cov kws tshawb fawb ntawm DuPont hauv xyoo 1938. Thaum lub sijhawm nruab nrab -1930s, DuPont tau tshawb nrhiav kev txhim kho cov chlorofl uorocarbons tshiab (CFCs) rau siv los ua cov tub yees. DuPont koom nrog General Motors los tsim ib lub tuam txhab hu ua Kinetic Chemicals los ua ke lawv cov kev siv zog hauv cheeb tsam no. Plunkett tshuaj xyuas cov khoom ntawm cov khoom. Nws pom tau hais tias cov khoom no yog inert rau lwm yam tshuaj, muaj ib tug siab melting point, thiab yog heev nplua nuj. Plunkett kuj tau ua haujlwm ntawm duplicating cov xwm txheej tsim nyog los tsim nws los ntawm TFE. Nws tau thov rau patent rau polytetrafl uoroethylene polymers hauv xyoo 1939, uas tau tso cai rau xyoo 1941 (US Patent 2230654). Nws muab patent rau Kinetic Chemicals. DuPont tau sau npe lub sij hawm Tefl nyob rau hauv 1945 thiab qhia Tefl ntawm cov khoom rau xyoo tom ntej. Teflon yog qhov zoo tshaj plaws rau kev siv hauv cookware, tab sis nws siv nyob rau hauv cheeb tsam no ua raws li cov ntawv thov kev lag luam hauv gaskets, sealers, daim kab xev, thiab hluav taws xob rwb thaiv tsev. Cov ntawv thov no yog qhov tshwm sim ncaj qha ntawm kev siv PTFE rau kev ua tub rog thaum Lub Ntiaj Teb Tsov Rog II. |
| Siv | Poly (tetrafluoroethylene) yog siv ntau pua daim ntawv thov ntxiv rau cookware. Poly (tetrafluoroethylene) yog siv rau hauv inks, plastics, coatings, thiab lubricants.Poly (tetrafluoroethylene) tuaj yeem molded rau hauv gaskets, seals, bearings, gears, thiab lwm yam tshuab. Poly (tetrafluoroethylene) yog siv los ua liners, rwb thaiv tsev, daim nyias nyias, thiab cov nplaum. Tefl ntawm daim kab xev feem ntau yog siv hauv cov kav dej. Poly (tetrafluoroethylene) yog siv los tsim cov khaub ncaws los nag. |
| Siv | Inert roj nplua nyeem. |
| Siv | polytetrafluoroethylene hmoov siv rau kev hloov kho yas, qhov nruab nrab particle loj yog hais txog 3-5 thiab 10-20 micrometer, PTFE muaj kev ua tau zoo heev, nws muaj cov khoom tshwj xeeb, suav nrog, tsis muaj tus kheej coagulation, tsis muaj electrostatic nyhuv, zoo intermiscibility, Tsawg molecular hnyav, zoo dispersion, siab self-lubrication, tsis tshua muaj kev sib txhuam coefficient, thiab lwm yam. |
| Siv | Rau kev sib txuas thiab sib txuas-hom hlau hauv cov khoom siv hluav taws xob; nyob rau hauv computer hlau, hluav taws xob daim kab xev, hluav taws xob Cheebtsam, spaghetti tubing. Cov ntsaws ruaj ruaj thiab piston rings, cov duab yooj yim, bearings, mechanical tapes, coated glass fabrics. Raws li tubing thiab nplooj ntawv rau kev kuaj tshuaj thiab cov txheej txheem ua haujlwm; rau hauv ob sab phlu cov hlab ntsha; rau gaskets thiab twj tso kua mis, qee zaum tov nrog graphite lossis iav fibers; raws li hluav taws xob insulator tshwj xeeb tshaj yog nyob rau hauv high zaus daim ntaub ntawv; lim ntaub; khaub ncaws tiv thaiv. Prosthetic pab. |
| Siv | PTFE (polytetrafluoroethylene) yog ib tug bulking tus neeg sawv cev, nws kuj yog siv nyob rau hauv cov tshuaj pleev ib ce npaj los txhim kho lub formulation qhov kev xav thiab kis tau. PTFe kuj tseem tuaj yeem muaj qee qhov dej tsis zoo. |
| Txhais | Ib qho hluavtaws polymer ua los ntawm tetrafluoroethene (ie CF2: CF ua2). Nws muaj peev xwm tiv taus qhov kub thiab txias yam tsis muaj decomposing thiab kuj muaj qhov sib txhuam qis heev, yog li nws siv hauv cov lauj kaub uas tsis yog-stick, bearings, thiab lwm yam. |
| Txhais | ChEBI: Ib qho polymer tsim los ntawm kev rov ua cov pawg tetrafluoroethyl. |
| Txoj kev tsim khoom | Polytetrafluoroethylene feem ntau yog tsim los ntawm tetrafluoroethylene roj los ntawm cov dawb radical polymerization nyob rau hauv siab nrog oxygen, peroxides, los yog peroxydisulfates. Cov "granular resins" muaj qhov nruab nrab me me uas nyob ntawm 30 mus txog 600 mm. Colloidal aqueous dispersions, ua los ntawm cov txheej txheem sib txawv, yog concentrated txog li 60% los ntawm qhov hnyav ntawm cov polymer thiab muaj qhov nruab nrab ntawm 0.2 hli. Coagulated dispersions nrog agglomerates uas nruab nrab 450mm kuj muaj. Kev siv PTFE ua tus neeg sawv cev tso tawm hauv cov coatings thiab qee yam lwm yam kev sib cuag zaub mov tau tso cai raws li FDA cov cai. |
| Kev npaj | Txoj kev nyiam ua lag luam ntawm kev npaj ntawm polytetrafluoroethylene (PTFE) yog los ntawm kev ncua polymerization. Cov ntsiab lus ntawm cov txheej txheem ua haujlwm tsis tau tshaj tawm tab sis pom tias ob txoj haujlwm tseem ceeb tau siv. Nyob rau hauv thawj txheej txheem, cov txheej txheem pa ntawm kev ncua poly merization yog siv los tsim cov khoom granular haum rau molding thiab extrusion. Lub tetrafluoroethylene yog polymerized nyob rau hauv siab nyob rau hauv stainless hlau autoclaves nrog ib tug dawb radical pib xws li ammonium persulphate. Cov tshuaj tiv thaiv yog ceev thiab exothermic thiab yuav tsum tau ceev faj tswj. Cov granules polymer yog sau, ntxuav thiab qhuav. Hauv cov txheej txheem thib ob, cov xwm txheej raug hloov kho kom muab cov khoom tawg ntawm cov polymer ntawm ntau qhov loj me me thiab qhov hnyav dua molecular. Cov khoom yuav ruaj khov thiab ua hauj lwm hauv daim ntawv latex hauv kev siv xws li zaj duab xis casting, txheej thiab impregnation ntawm fibers. Xwb, cov khoom yuav raug coagulated los muab cov hmoov (feem ntau hu ua 'dispersion polymer') feem ntau yog siv rau extrusion ntawm nyias nyias seem. |
| Kev piav qhia dav dav | Poly (tetrafluoroethylene) yog fluoropolymer uas yog kev lag luam hu ua PTFE. Nws cov khoom muaj xws li siab thermal stability, zoo heev tshuaj tiv thaiv, tsis tshua muaj dielectric tas li thiab tsis tshua muaj zog nto. Nws yog hydrophobic polymer uas feem ntau yog siv los tiv thaiv txheej ntawm hlau. |
| Hazard | Evolves tshuaj lom pa taws ntawm cua sov. Cov lus nug - muaj peev xwm carcinogen. |
| Health Hazard | Cov pa hluav taws kub ntawm polytetrafluo roethylene (PTFE) ua rau cov fume fever, ib qho mob khaub thuas zoo li mob khaub thuas. |
| Kev siv tshuab | Cov polymer yog insoluble, resistant rau tshav kub (txog 275 degree) thiab tshuaj tua kab mob, thiab, nyob rau hauv tas li ntawd, muaj qhov qis tshaj coefficient ntawm kev sib txhuam ntawm cov khoom.Vim nws tsis kam mus rau tshav kub, fabrication ntawm polytetrafluoroethylene yuav tsum tau hloov kho cov pa txoj kev. Tom qab molding thepowdered polymer siv cov xovxwm txias, cov moldings yog sintered ntawm 360 mus rau 400 degree los ntawm cov txheej txheem zoo ib yam li cov siv hmoov metallurgy. Cov khoom siv thesintered tuaj yeem ua tshuab lossis xuas nrig ntaus.Extrusion yog ua tau yog tias cov hmoov sib xyaw nrog cov khoom siv lubricating. Aqueoussuspensions ntawm cov polymer kuj tseem siv tau rau coating ntau yam khoom. Txawm li cas los xij, cov kev kho tshwj xeeb yuav tsum tau ua kom muaj adhesion vim polytetrafluoroethylene tsis ua raws li txhua yam. Polytetrafluoroethylene (TFE resin) muaj txiaj ntsig zoo rau cov ntawv thov nyob rau hauv huab cua kub thiab tshuaj lom neeg ua haujlwm. Polytetrafluoroethylenebearings, lub rooj zaum valve, packings, gaskets, coatings, thiab tubing tuaj yeem tiv taus qhov mob hnyav. Fillers xws li carbon, inorganicfibers, thiab hlau hmoov yuav raug muab tso ua ke los hloov kho cov khoom siv thiab thermal. Vim nws cov khoom siv hluav taws xob zoo heev, polytetrafluoroethylene yog qhov tseem ceeb thaum cov khoom siv adielectric xav tau rau kev pabcuam ntawm qhov kub siab. Qhov tsis zoo ntawm qhov tsis zoo yog feem ntau tig los ua kom zoo dua hauv kev siv cov khoom siv polytetrafluoroethyleneto tsho xws li rollsand cookware rau cov ntaub ntawv uas yuav ua rau lwm yam. |
| Kev ruaj ntseg Profile | Cov khoom ua tiav polymerized yog inert nyob rau hauv cov xwm txheej zoo tib yam. Muaj cov lus ceeb toom ntawm "polymer fume fever" nyob rau hauv tib neeg raug rau cov khoom pyrolysis, uas kuj yog irritants. Smohng yuav tsum raug txwv nyob rau hauv cov cheeb tsam uas cov khoom no yog fabricated los yog, feem ntau, qhov twg tej zaum yuav muaj plua plav los ntawm nws. Kev cuam tshuam rau pyrolysis lossis decomposition cov khoom zoo li yog qhov teeb meem loj txog kev noj qab haus huv. Cov lus nug carcinogen nrog kev sim cov ntaub ntawv tumorigenic los ntawm implant. Incompatible nrog fluorine, sodmm potassium alloy. Nyob rau hauv cov xwm txheej zoo nws raug kev phom sij txaus ntshai nrog boron, magnesium, lossis titanium. Thaum rhuab mus rau saum 750 degree F nws decomposes yield fumes lom heev ntawm F-. |
| Carcinogenicity | Cov kev tshawb fawb tsiaj tsis tau pom tias cov polymer no yog carcinogenic. Tsis muaj ntaub ntawv muaj nyob rau hauv tib neeg. Lub polymer tsis yog cais raws li nws cov tib neeg carcinogenicity. Txawm li cas los xij, EPA pom tias perfluorooctanoic acid (PFOA), cov tshuaj siv los tsim PTEE yog "zoo li carcinogen. |
| Environmental Fate | PTFE yog qhov ruaj khov tshaj plaws ntawm tag nrho cov TFE polymers thiab nyob rau hauv physiological tej yam kev mob tsis tso tawm tej yam khoom (IARC Monograph 74, 1999). PTFE yog heev inert chemically; tsuas yog alkali hlau thiab fluorine nyob rau hauv siab nres PTFE (Hazardous Substances Data Bank (HSDB)). Tsis muaj kev paub txog ecotoxicological teebmeem rau PTFE (DuPont MSDS, 2011). |
| Kev tshuaj ntsuam toxicity | Tsis muaj qhov pom tseeb ntawm cov tshuaj toxicity rau qhov ncauj tswj hwm PTFE raws li tsis muaj kev cuam tshuam toxicologically tseem ceeb tau pom tom qab kev tswj hwm qhov ncauj rau nas mus txog 90 hnub. Qhov tsis muaj toxicity feem ntau yog vim muaj cov hauv qab no: (1) plab hnyuv nqus ntawm PTFE yog negligible muab nws qhov hnyav molecular siab heev (1 000 000–10 000 000 rau PTFE hmoov zoo); (2) PTFE yog chemically inert nyob rau hauv physiologic tej yam kev mob; thiab (3) PTFE tsis metabolized (Donova et al., 1990; Kim, 1996; Veber et al., 2002). Cov txheej txheem ntawm kev txiav txim ntawm subcutaneously txhaj PTFE nyob rau hauv nas yog ntaus nqi rau localized o raws li ib tug txawv teb chaws teb; Cov teebmeem zoo sib xws tau pom tom qab txhaj tshuaj subareolar hauv cov luav thiab dev, thiab kev txhaj tshuaj periurethral hauv dev. Thaum PTFE yog cua sov los yog raug kub siab dua los yog sib npaug li 200 degree, nws yuav decompose thiab tso tawm cov pa phem uas ua rau polymerfume kub taub hau rau tib neeg. |
| Poly (tetrafluoroethylene) Cov Khoom Muag Khoom thiab Raw Khoom |
| Cov khoom siv raw | Tetrafluoroethylene-->Dispersing tus neeg sawv cev |
| Cov khoom npaj | Micaceous Iron Oxide-->BORON PHOSPHATE-->Cov khoom siv polytetrafluoroethylene |
Cim npe nrov: Tuam Tshoj poly (tetrafluoroethylene) manufacturers, lwm tus neeg, Hoobkas
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