Polyacrylonitrile hmoov, tshuaj formula (C3H3N) n, CAS 25014-41-9, yog ib tug polymer compound tau los ntawm dawb radical polymerization ntawm monomer acrylonitrile. Cov acrylonitrile units nyob rau hauv macromolecular saw yog txuas nrog nyob rau hauv ib tug sib koom tes tus Tsov tus tw. Feem ntau yog siv los ua polyacrylonitrile fibers (PAN), lub zog tsis siab, thiab hnav tsis kam thiab qaug zog kuj tsis zoo. Qhov zoo ntawm polyacrylonitrile fiber ntau yog cov huab cua tsis zoo thiab lub hnub tiv thaiv, thiab nws tuaj yeem tswj tau 77% ntawm nws lub zog qub tom qab muab tso rau sab nraum zoov rau 18 lub hlis. Nws kuj yog resistant rau tshuaj reagents, tshwj xeeb tshaj yog inorganic acids, bleaching hmoov, hydrogen peroxide, thiab cov organic reagents.
Polyacrylonitrile (PAN), raws li qib siab - cov khoom siv hluavtaws ua haujlwm, tau ua kom pom qhov tsis muaj txiaj ntsig ntawm daim ntawv thov hauv ntau qhov chaw vim nws cov qauv molecular tshwj xeeb thiab cov khoom siv tshuaj lom neeg. Nws cov ntawv thov tseem ceeb npog rau 6 cov lus qhia: carbon fiber precursors, textile cov ntaub ntawv, industrial engineering, kev kho mob thiab kev noj qab haus huv, lub zog cia, thiab ib puag ncig tiv thaiv technology, tsim ib tug ua tiav kev lag luam saw los ntawm cov ntaub ntawv yooj yim mus rau siab - kawg daim ntawv thov.
Cov pa roj carbon fiber ntau ua ntej: lub hauv paus pob zeb ntawm siab -kev tsim khoom kawg
Nws yog cov khoom siv tseem ceeb rau kev npaj cov pa roj carbon fibers, thiab txog 90% ntawm cov pa roj carbon fibers thoob ntiaj teb siv PAN ua ntej. PAN fibers tuaj yeem hloov mus rau hauv siab -kev ua haujlwm carbon fibers los ntawm cov txheej txheem xws li ua ntej oxidation thiab carbonization, nrog lub zog tensile ntawm 3.5-7.0 GPa thiab modulus ntawm 230-630 GPa. Lawv tau siv dav hauv aerospace, automotive lightweighting, cua zog tsim, thiab lwm yam.
Cov xwm txheej:
Aerospace: Cov khoom tseem ceeb ntawm C919 aircraft tsim nyob rau hauv domestic, xws li tis thiab tail fins, yog ua los ntawm PAN raws li carbon fiber composite cov ntaub ntawv, uas txo qhov hnyav los ntawm 30% thiab txhim kho roj efficiency los ntawm 15% piv rau cov tsoos hlau cov ntaub ntawv.
Kev lag luam tsheb: Tesla Model S lub cev yog ua los ntawm PAN carbon fiber reinforced yas (CFRP), ua tiav 10% qhov hnyav thiab nce 8% ntau.
Cua tsim hluav taws xob: Lub Vestas V236-15.0MW cua turbine hniav siv PAN carbon fiber, ntev ntawm 115.5 meters, thiab lub zog tsim efficiency yog 20% siab dua li cov iav fiber ntau.
Technological breakthrough: Shenzhen University koom tes nrog cov lag luam kom ua tiav pawgpolyacrylonitrile hmoovntawm T1000 qib carbon fiber nyob rau qib txhiab tuj, nrog lub zog ntawm 6.8GPa thiab modulus ntawm 320GPa. Nws tau siv nyob rau hauv lub domestic loj aircraft muab system, rhuav lub txawv teb chaws technologies monopoly.
Textile cov ntaub ntawv: ib tug upgraded version ntawm hluavtaws ntaub plaub
Polyacrylonitrile fiber (PAN) yog lub npe hu ua "synthetic wool" vim nws cov tsos thiab txhais tes zoo li cov ntaub plaub, thiab nws cov nyiaj ntau tshaj 15% ntawm tag nrho cov hluavtaws fiber ntau. Los ntawm kev hloov pauv copolymerization, acrylic fiber tuaj yeem muaj cov tshuaj tiv thaiv - zoo li qub, nplaim taws - retardant, antibacterial thiab lwm yam khoom, thiab yog siv dav hauv cov khaub ncaws, tsev thiab kev lag luam textiles.
Application Scenario:
Cov khaub ncaws: Knitted sweaters ua los ntawm kev sib xyaw ntawm acrylic thiab ntaub plaub, nrog rau 30% nce hauv kev sov so thiab tus nqi tsuas yog 60% ntawm cov khoom siv wool ntshiab; Thawj cov xim acrylic fiber ntau yog siv rau cov tsev pheeb suab sab nraum zoov, nrog lub hnub ceev ceev ntawm qib 5 (txheej txheem thoob ntiaj teb) thiab kev pab cuam ntev dua 8 xyoo.
Kev kho kom zoo nkauj hauv tsev: Acrylic cov ntaub pua plag muaj qhov zoo stain zoo dua li cov ntaub pua plag, txo cov nqi tu los ntawm 50%; Acrylic curtains muaj cov nplaim hluav taws kub nyhiab ntawm B1 (Suav tus qauv), txo qhov kev pheej hmoo ntawm hluav taws.
Muaj ntaub: Acrylic reinforced pob zeb yog siv rau kev tsim kho choj, nrog rau 40% nce nyob rau hauv tawg ntho tus nqi; Acrylic fiber ntau lim cov khoom txo cov plua plav emission concentration kom qis dua 10mg / m ³ hauv kev kho cov cement cog flue roj (lub teb chaws tus qauv Tsawg dua lossis sib npaug li 30mg / m ³).
Cov ntaub ntawv lag luam: Hauv xyoo 2024, Tuam Tshoj cov khoom siv acrylic fiber ntau yuav ncav cuag 1.2 lab tons, suav txog 45% ntawm tag nrho cov khoom lag luam thoob ntiaj teb. Ntawm lawv, kev noj nyob rau sab hnub tuaj Tuam Tshoj yuav suav txog 45%, feem ntau yog siv rau cov khaub ncaws thiab cov ntaub npuag.
Industrial Engineering: Kev xaiv zoo tshaj plaws ntawm Corrosion Resistant Materials
Cov tshuaj tiv thaiv corrosion ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev lag luam xws li tshuaj lom neeg engineering thiab lub zog. Los ntawm kev hloov pauv copolymerization, PAN tuaj yeem ua rau hauv cov fibers tshwj xeeb thiab cov resins uas yog acid resistant, alkali resistant, thiab hnyav resistant, uas yog siv nyob rau hauv cov xwm txheej xws li cov kav dej, tso tsheb hlau luam, thiab tiv thaiv -corrosion coatings.
Tej kev siv:
Chemical pipelines: PAN raws li cov kav dej fiberglass muaj lub neej kev pab peb zaug ntev dua li cov kav dej hlau hauv kev thauj mus los ntawm sulfuric acid thiab hydrochloric acid, thiab cov nqi kho mob raug txo los ntawm 60%.
Cov khoom siv hluav taws xob cia: PAN fiber ntau yog siv los ua cov khoom siv rau lithium -ion roj teeb cais, nrog lub porosity ntawm 40%, qhov nce ntawm ion conductivity ntawm 20%, thiab lub roj teeb lub neej dhau 3000 zaug.
Dej hiav txwv engineering: PAN coated steel qauv muaj kev tiv thaiv corrosion ntawm C5 (txheej txheem thoob ntiaj teb) nyob rau hauv dej hiav txwv ib puag ncig, thiab kev txij nkawm tau txuas ntxiv los ntawm 5 xyoo mus rau 15 xyoo.
Kev kawm txuj ci: Zhongfu Shenying tau tsim PAN raws siab -kub fibers nrog qhov kub tsis kam ntawm 300 degree, uas tau siv rau hauv lub tshuab hluav taws xob thermal tiv thaiv, txo tus nqi ntawm cov khoom siv los ntawm 40%.
Kev Noj Qab Haus Huv Kev Noj Qab Haus Huv: Kev Txhim Kho hauv Biocompatibility
Biological inertness muabpolyacrylonitrile hmoovib qho tshwj xeeb kom zoo dua hauv kev kho mob. Los ntawm kev hloov kho saum npoo, PAN tuaj yeem siv los tsim cov khoom kho mob siab tshaj -kawg cov khoom siv xws li cov hlab ntsha, cov hlab ntsha, thiab cov khoom siv tshuaj, txhawb kev txhim kho cov tshuaj kho dua tshiab.
Cov ntawv thov tshiab:
Artificial hlab ntsha: PAN raws li me me - txoj kab uas hla cov hlab ntsha (txoj kab uas hla<6mm) have a patency rate of 90%, which is 20% higher than polytetrafluoroethylene (PTFE) blood vessels, and have entered the clinical trial stage.
Kev kho neural: PAN paj ntaub conduit coj axonal regeneration ntawm tus nqi ntawm 1 hli / hnub, uas yog 50% luv dua li kho lub voj voog ntawm autologous paj hlwb hloov, thiab yog siv rau kev kho mob ntawm peripheral paj hlwb raug mob.
Cov tshuaj tswj kev tso tawm: PAN nanofiber cov tshuaj xa khoom ua tiav cov tshuaj tiv thaiv kev tso tawm rau 72 teev, txo cov ntshav cov tshuaj hloov pauv los ntawm 60%, thiab siv rau kev kho mob qog noj ntshav.
Kev ua lag luam muaj peev xwm: Kev lag luam thoob ntiaj teb PAN cov ntaub ntawv kho mob xav tias yuav ncav cuag $ 500 lab los ntawm 2025, nrog kev loj hlob txhua xyoo ntawm 12%, ntawm cov cheeb tsam Asia Pacific suav txog ntau dua 40%.
Lub zog cia: 'core' ntawm supercapacitors
Polyacrylonitrile based activated carbon has become the preferred electrode material for supercapacitors due to its high specific surface area (>2000m² / g) thiab conductivity zoo heev. PAN activated carbon electrode muaj lub peev xwm tshwj xeeb ntawm 120F / g thiab lub zog ntom ntom ntawm 10kW / kg, thiab tau siv dav hauv thaj chaw xws li lub zog tshiab tsheb thiab cov phiaj xwm ntse.
Cov ntaub ntawv thov:
Lub zog tshiab tsheb: BYD e6 tau nruab nrog PAN raws li supercapacitors, txo cov sijhawm them ceev mus rau 15 feeb thiab nce ntau ntxiv los ntawm 10%.
Smart Grid: Lub Xeev Daim phiaj ua qauv qhia qhov project txais PAN supercapacitor lub zog cia, nrog cov lus teb zaus ntawm milliseconds thiab 30% kev txhim kho hauv kab sib chaws.
Consumer Electronics: Huawei Mate 60 xov tooj siv PAN raws li graphene composite electrodes, uas ua rau kom them ceev ceev los ntawm 50% thiab muaj roj teeb lub neej dhau 2000 zaug.
Kev siv thev naus laus zis: Kev tshawb fawb thiab kev txhim kho ntawm PAN thiab graphene composite electrode cov ntaub ntawv tau nrawm dua, thiab nws xav tias lub zog ceev yuav dhau 15Wh / kg thiab tus nqi yuav raug txo los ntawm 30% los ntawm 2025.
Nrog nws ntau yam kev hloov kho muaj peev xwm thiab hla kev qhuab qhia cov yam ntxwv, nws tau dhau los ua cov khoom siv tseem ceeb rau kev lag luam niaj hnub no. Los ntawm siab -kev tsim khoom kawg mus rau thaj chaw ntawm tib neeg txoj kev ua neej, los ntawm kev lag luam ib txwm muaj mus rau cov thev naus laus zis tshiab, PAN tau txhawb kev txhim kho kev lag luam nrog tus cwj pwm ntawm "cov ntaub ntawv hloov pauv". Nrog rau kev nrawm ntawm cov pa roj carbon fiber ntau hauv zos, kev ua tiav hauv cov khoom siv kho mob tshiab, thiab kev hloov kho dua tshiab hauv kev tiv thaiv ib puag ncig, lub ntiaj teb kev lag luam loj yuav tsum muaj ntau dua 990 lab US las los ntawm 2029, coj mus rau lub sijhawm tshiab ntawm kev ua haujlwm siab - cov ntaub ntawv ua tau zoo.
Polyacrylonitrile hmoovyog tau los ntawm dawb radical polymerization ntawm monomer acrylonitrile. Cov acrylonitrile units nyob rau hauv macromolecular saw yog txuas nrog nyob rau hauv ib tug sib koom tes tus Tsov tus tw. Feem ntau yog siv los ua polyacrylonitrile fibers, polyacrylonitrile fibers (feem ntau hu ua acrylic fibers) muaj zog tsawg, hnav tsis zoo, thiab qaug zog. Qhov zoo ntawm polyacrylonitrile fiber ntau yog cov huab cua tsis zoo thiab lub hnub tiv thaiv. Nws kuj yog resistant rau tshuaj reagents, tshwj xeeb tshaj yog inorganic acids, bleaching hmoov, hydrogen peroxide, thiab cov organic reagents.
Txoj Kev 1: Laboratory Method
Txoj kev kuaj kev npaj ntawm polyacrylonitrile feem ntau yog ua raws li cov tshuaj tiv thaiv dawb radical polymerization. Cov hauv qab no yog cov kauj ruam tshwj xeeb thiab ceev faj:
Dawb radical polymerization yog ib qho ntxiv polymerization cov tshuaj tiv thaiv uas, los ntawm kev ua ntawm ib tug dawb radical pib, ua rau cov saw loj hlob thiab cov dawb radicals mus tas li nce, yog li txuas ntau monomers los tsim cov molecules loj. Hauv cov txheej txheem no, cov pa roj carbon ob daim ntawv cog lus ntawm monomer acrylonitrile tau qhib, thiab nws tau rov qab ua dua ntxiv nrog rau lwm cov monomer molecules, thaum kawg tau txais polyacrylonitrile polymer compounds.
Cov khoom siv sim: peb lub caj dab lub raj mis, lub siab tsis tu ncua ntawm lub qhov dej, sib nqus stirrer, tus pas ntsuas kub, thiab lwm yam.
Kev sim tshuaj reagents: Acrylonitrile monomer, dawb radical pib (xws li benzoyl peroxide, thiab lwm yam), hnyav (xws li dimethylformamide DMF, thiab lwm yam., siv los yaj cov monomer thiab pib).
Txhim kho peb lub caj dab caj dab mus rau qhov sib nqus stirrer thiab nruab ib lub siab tsis tu ncua poob funnel thiab tus pas ntsuas kub.
Txheeb xyuas qhov airtightness ntawm lub cuab yeej kom paub tseeb tias tsis muaj qhov xau.
Ntxiv ib qho nyiaj ntawm acrylonitrile monomer thiab hnyav, nrog rau tus nqi tsim nyog ntawm cov dawb radical pib, rau peb lub caj dab caj dab.
Nyob rau hauv qhov kev txiav txim ntawm sib nqus nplawm, lub monomer thiab pib sib xyaw kom zoo.
Thaum tshav kub kub cov tshuaj tiv thaiv rau qhov kub thiab txias (nyob ntawm seb hom thiab kev ua haujlwm ntawm tus neeg pib) los pib cov tshuaj tiv thaiv dawb radical polymerization.
Thaum lub sij hawm cov txheej txheem cov tshuaj tiv thaiv, cov seem acrylonitrile monomer yog maj mam ntxiv dropwise mus rau hauv cov tshuaj tiv thaiv kab mob los ntawm ib tug tas li lub siab xa me nyuam rov funnel kom muaj kev ruaj ntseg ntawm cov tshuaj tiv thaiv system.
Tom qab cov tshuaj tiv thaiv tiav, txias cov tshuaj tiv thaiv rau hauv chav sov.
Lim, ntxuav, thiab qhuav cov khoom uas tau txais polyacrylonitrile kom tshem tawm cov monomers thiab cov kuab tshuaj tsis ua haujlwm.
(1) Kev sim kev nyab xeeb:
Thaum lub sijhawm sim, cov cuab yeej tiv thaiv tsim nyog xws li tsom iav thiab hnab looj tes yuav tsum hnav.
Lub chaw soj nstuam yuav tsum ua kom muaj cua zoo kom tsis txhob muaj cov pa phem.
(2) Kev sim tej yam kev mob:
Cov tshuaj tiv thaiv kub, lub sijhawm, thiab hom thiab tus nqi ntawm cov neeg pib muaj qhov cuam tshuam loj rau tus nqi ntawm cov tshuaj tiv thaiv polymerization thiab cov khoom ntawm cov khoom. Yog li ntawd, ua ntej ua qhov kev sim, nws yuav tsum ua tib zoo tshuaj xyuas cov ntaub ntawv muaj feem xyuam thiab txiav txim siab qhov kev sim tsim nyog.
(3) Cov khoom purity:
Thaum lub sij hawm tshaj tawm - cov txheej txheem ua tiav, cov khoom yuav tsum tau muab ntxuav kom huv si thiab qhuav kom tshem tawm cov monomers thiab cov kuab tshuaj uas tsis muaj kev cuam tshuam thiab txhim kho qhov purity ntawm cov khoom.
(4) Kev sim ib puag ncig:
Qhov kev sim yuav tsum tau ua nyob rau hauv qhuav thiab plua plav- ib puag ncig dawb kom tsis txhob muaj kev cuam tshuam ntawm impurities ntawm qhov kev sim.
Txoj Kev 2: Kev Tsim Kho Kev Lag Luam
Muaj ntau ntau txoj hauv kev rau polyacrylonitrile fibers, tsim cov txheej txheem tshwj xeeb.
Kev sib koom ua ke ntawm cov txheej txheem no yog siv cov kev daws teeb meem (ntub thiab qhuav) spinning txoj kev, nrog rau cov kev kho mob hnyav rov qab.
Qhov sib txawv ntawm cov txheej txheem no yog:
(1) sib txawv copolymer muaj pes tsawg leeg;(2) Txoj kev sib txawv polymerization (heterogeneous nag lossis daus polymerization lossis homogeneous polymerization);(3) Cov kuab tshuaj sib txawv (xws li dimethylformamide, dimethylacetamide, dimethyl sulfoxide, vinyl carbonate, sodium thiocyanate, nitric acid, zinc chloride, thiab lwm yam):(4) Cov txheej txheem sib txawv (ntub lossis qhuav spinning, siv sib txawv coagulation da dej hauv ntub spinning);(5) Sib txawv stretching thiab post- txheej txheem txheej txheem;(6) Cov txheej txheem rov qab sib txawv.Qhov tseem ceeb tshaj plaws nyob rau hauv ntau yam txheej txheem yog qhov hnyav, uas txiav txim siab txog cov txheej txheem txheej txheem xws li kev npaj cov txheej txheem ntawm cov tshuaj spinning, spinning tej yam kev mob, hnyav rov qab txoj kev, thiab txoj kev kho dej khib nyiab. Nws tseem cuam tshuam rau ntau yam xws li kev tiv thaiv hluav taws, tiv thaiv roj, thiab xaiv cov khoom siv.
Cov hmoov dawb uas tau txais los ntawm kev ncua polymerization txoj kev yog soluble hauv cov kuab tshuaj organic xws li dimethylformamide lossis cov kev daws teeb meem xws li thiocyanate; Cov tshuaj polyacrylonitrile yog tau los ntawm txoj kev daws teeb meem polymerization.
Txoj Kev 3: Kev npaj ntawm halogen-dawb nplaim- retardant PAN fibers
Ntxiv 1g ntawm lub tshuab nqus tsev qhuav P (AN co VAc) fiber ntau rau hauv 500mL ib leeg caj dab, kho cov pH ntawm lub cev los ntawm kev ntxiv KOH aqueous tov, do nyob rau hauv chav tsev kub rau 12 teev, tshem tawm cov fiber, ntxuav nws nrog dej deionized kom txog thaum nruab nrab, thiab thaum kawg qhuav nws nyob rau hauv lub tshuab nqus tsev qhov cub ntawm 60℃rau 24 xuab moos hydropolyc (24 xuab moos). nrog rau pH qhov tseem ceeb ntawm 10, 12, thiab 14.
Rau 500mL peb lub caj dab fwj nruab nrog lub siab tsis tu ncua, 0.5g ntawm cov khoom siv hydrolysis ntawm cov qhuav P (AN co VAc) copolymer fiber npaj nyob rau hauv pH =12 thiab hydrolysis tej yam kev mob rau 12 teev thiab 20mL ntawm dimethylformamide (DMF) tau txuas ntxiv. Tom qab soaking rau 1 teev, 5mL ntawm O, O-diethyl phosphoryl chloride tau maj mam poob mus rau hauv lub siab tsis tu ncua tee funnel ntawm chav tsev kub nyob rau hauv sib nqus stirring, thiab ces rhuab mus rau 60℃rau 5 teev. Tom qab tshem tawm cov fiber ntau, nws tau ntxuav ob zaug nrog anhydrous ethanol thiab peb zaug nrog dej distilled. Tom qab ziab, halogen{13}}dawb nplaim- retardantpolyacrylonitrile hmoovtau txais fiber ntau.
Xyoo 1931, Los nag hauv lub teb chaws Yelemees thawj zaug tsim polyacrylonitrile (PAN), tab sis vim nws insolubility nyob rau hauv feem ntau cov organic thiab inorganic cov kuab tshuaj thiab melting kub siab tshaj qhov decomposition kub, nws tsis muaj peev xwm siv cov paub daws spinning thiab yaj spinning txoj kev nyob rau lub sij hawm ntawd, thiab PAN tsis tuaj yeem ua rau hauv fibers.
PAN fibers yog thawj industrialized los ntawm DuPont.
Polyacrylonitrile fibers hais txog fibers spun los ntawm polyacrylonitrile los yog copolymer nrog cov ntsiab lus acrylonitrile ntau dua 85%.
lub ntiaj teb polyacrylonitrile fiber ntau lawm yog 2.6685Mt, thiab Tuam Tshoj lub polyacrylonitrile fiber ntau lawm yog 473.7kt.
Kev tshawb fawb thiab kev loj hlob tiam sis ntawm polyacrylonitrile fibers tuaj yeem muab faib ua ob yam;
Ua ntej
Kev tshawb fawb ntawm cov txheej txheem tshiab fiber ntau, xws li siv cov txheej txheem plasticizer los ua ke polyacrylonitrile copolymer, txhawm rau txo cov kev sib cuam tshuam ntawm polyacrylonitrile macromolecules thiab txo qhov melting point ntawm cov polymer, thiab siv cov txheej txheem yaj spinning los yog ua kom cov concentration ntawm spinning slurry nyob rau hauv qhuav spray ntub spinning txheej txheem los txhim kho cov neeg kho tshuab zog ntawm daim ntawv raw fibers.
Thib ob
Nws yog los kawm txog ntau yam tshiab ntawm polyacrylonitrile fibers, xws li nplaim taws -retardant polyacrylonitrile fibers, siab shrinkage polyacrylonitrile fibers, online coloring technology thaum lub sij hawm polyacrylonitrile fiber spinning, anti-static polyacrylonitrile fibers, siab nqus dej polyacrylonitrile fibers, zoo yarn fibers, composite polyacrylonitrile fibers, antibacterial thiab tsw proof polyacrylonitrile fibers, deb-infrared polyacrylonitrile fibers, siab -lub zog thiab siab modulus polyacrylonitrile fibers, thiab lwm yam.
Cov lus nug nquag
Polyacrylonitrile siv rau dab tsi?
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PAN yog siv los tsim ntau yam khoom xws liUltra filtration membranes, hollow fibers rau thim rov qab osmosis, fibers rau textiles, thiab oxidized PAN fibers. PAN fibers yog cov tshuaj precursor ntawm siab heev - zoo carbon fiber.
Dab tsi yog cov khoom siv raw rau polyacrylonitrile?
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Lub ntsiab monomer rau kev npaj polyacrylonitrile yog acrylonitrile (AN), uas tuaj yeem tsim los ntawmpetroleum, natural gas, thee, calcium carbide, thiab lwm yam, thiab muaj ntau txoj hauv kev. Tam sim no txoj kev propylene ammoxidation yog dav siv. Nyem rau lub npe khoom kom pom cov ntsiab lus ntawm cov khoom.
Puas yog polyacrylonitrile muaj kev nyab xeeb?
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Thaum polyacrylonitrile yogtsis xam tshwj xeeb yog txaus ntshai, kev tsim khoom thiab kev ua haujlwm tuaj yeem ua rau muaj kev pheej hmoo. Piv txwv li, nqus cov hmoov av los yog fumes uas tsim thaum lub sij hawm tsim polyacrylonitrile tuaj yeem ua rau muaj kev phom sij.
Puas yog polyacrylonitrile yas?
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Polyacrylonitrile (PAN),ib tug hluavtaws cobnpaj los ntawm polymerization ntawm acrylonitrile. Ib tug tswv cuab ntawm tsev neeg tseem ceeb ntawm acrylic resins, nws yog ib qho nyuaj, cov khoom siv thermoplastic uas tiv taus rau feem ntau cov kuab tshuaj thiab tshuaj, ua kom kub hnyiab, thiab tsis tshua muaj permeability rau gases.
Dab tsi yog 4 hom polymer cov qauv?
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Plaub txheej txheem polymer yoglinear, branched, crosslinked, thiab networked. Daim duab ntawm linear, branched, crosslinked, thiab networked polymer cov qauv.
Cim npe nrov: Polyacrylonitrile hmoov CAS 25014-41-9, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom