Nitrile Rubber yog dab tsi?
Nitrile roj hmab yog tsim los ntawm butadiene thiab acrylonitrile los ntawm emulsion polymerization. Cov tshuaj pleev yog tsim los ntawm cov tshuaj pleev xim polymerization ntawm qhov kub thiab txias. Yog li ntawd, nws hnav tsis kam thiab kub tsis kam yog muaj zog thiab nws adhesion zoo. Nws maj mam dhau los ua cov khoom siv elastic tseem ceeb hauv tsheb, aviation, roj av, luam ntawv, thiab lwm yam lag luam.
Butadiene monomer muaj peb txoj kab sib txawv: CIS, trans, thiab 1,2-burnt pawg. Feem ntau, trans hauv nitrile roj hmab cov khoom lag luam suav txog li 78%. Tsis tas li ntawd, nws cov qauv saw molecular muaj ib pawg cyano, yog li nws cov roj kuj zoo dua li cov roj hmab dav dav. Cov roj hmab no suav nrog cov roj hmab ntuj, neoprene, thiab styrene-butadiene roj hmab; Ntawm lawv, cov roj kuj tseem yog tsom rau cov roj ntxhia, roj ua kua, tsiaj thiab zaub roj, thiab hnyav.
Qhov kev ua tau zoo tshaj plaws ntawm Nitrile yog roj tsis kam. Nrog nws cov roj ua haujlwm zoo, cov roj hmab nitrile feem ntau yog siv los ua cov khoom siv roj hmab resistant. Nitrile roj hmab tuaj yeem siv los ua ntau yam khoom siv roj-resistant roj hmab, nrog rau ntau yam roj-resistant gaskets, lub tes tsho, ntim tau yooj yim, yooj ywm hose, luam ntawv thiab dyeing cots, cable roj hmab cov ntaub ntawv, thiab lwm yam.
Lwm qhov kom zoo dua ntawm cov khoom siv roj hmab nitrile yog tias nws muaj kev pabcuam kub dua piv nrog lwm cov roj hmab, thiab lawv qhov kub thiab txias ua haujlwm ntev tuaj yeem ncav cuag 120 ℃; Qhov kub hloov pauv iav qis tshaj plaws tuaj yeem ncav cuag - 55 ℃. Kuj muaj qee qhov tsis zoo. Nws Tib lub sijhawm, nws cov rwb thaiv tsev kev ua haujlwm tsis zoo heev thiab nws cov elasticity kuj tsawg.
Silicone Rubber yog dab tsi?
Lub npe Askiv ntawm silica gel yog Silica gel lossis Silica, cov tshuaj formula yog mSiO2 nH2O, thiab nws tseem tuaj yeem hu ua silica gel. Nws yog cov khoom siv adsorptive nrog kev ua haujlwm siab, thiab nws cov khoom siv yog amorphous. Silica gel feem ntau yog pob tshab los yog milky dawb granular khoom; Cov qauv yog tshwj xeeb thiab qhib ntxeem tau. Cov qauv no muab cov xwm txheej zoo rau adsorbing ntau cov tshuaj, thiab nws muaj qhov zoo adsorption. Tsis tas li ntawd, nws kuj tuaj yeem hloov mus rau hauv hydrated silica gel, uas yog khoom. Cov kauj ruam tshwj xeeb yog ntxiv dilute sulfuric acid (los yog hydrochloric acid) rau cov kua dej ntawm sodium silicate hauv lub xeev zoo li qub. Tom qab ntawd ntxuav cov electrolyte ions, xws li Na + thiab SO42 - (Cl -) nrog dej huv. Tom qab ziab, silica gel tuaj yeem tau. Txhawm rau piav qhia lub zog ntawm nws cov adsorption, noj dej ua piv txwv, lub peev xwm adsorption dav dav tuaj yeem ncav cuag li 40% thiab qhov muaj zog tuaj yeem ncav cuag 300%. Vim tias cov yam ntxwv ntawm silica gel no, nws tuaj yeem siv rau r roj kom qhuav, nqus pa, ua kua dej, chromatography, catalyst, thiab lwm yam. Thiab nyob rau hauv cov txheej txheem siv tshwj xeeb, cov xim ntawm silica gel kuj txawv. Piv txwv li, thaum cobalt chloride ntxiv: nws yog xiav hauv lub xeev qhuav, liab tom qab nqus dej, thiab tuaj yeem siv tau ntau zaus. Yog tias koj tab tom nrhiav nqa cov khoom zoo silicone no rau hauv koj lub lag luam, xav txog Suconvey silicone roj hmab khoom tsum ntawm kev tsim cov kev daws teeb meem rau yuav ua li cas ua kom koj cov phiaj xwm tom ntej ua tau zoo dua!
Cov khoom tseem ceeb muaj nyob rau hauv silica gel yog silica. Cov yam ntxwv ntawm silica yog ruaj khov. Nws tsis yog soluble nyob rau hauv dej los yog reacts nrog dej. Vim yog cov yam ntxwv ntawm silica, silica gel tsis yooj yim rau hlawv thiab nws cov khoom yog qhov ruaj khov. Thaum lub sijhawm ua haujlwm, cov plua plav cov ntsiab lus hauv lub rhiav yuav tsum tau tswj tsis pub dhau 10mg / m3. Nyob rau tib lub sijhawm, cov neeg ua haujlwm yuav tsum tau ntxiv dag zog rau qhov cua thiab hnav lub qhov ncauj qhov ntswg. Tsis tas li ntawd, vim muaj zog adsorption muaj peev xwm ntawm silica gel, nws yog ib qho yooj yim los ua dryness rau tib neeg cov tawv nqaij, yog li cov neeg ua hauj lwm yuav tsum hnav khaub ncaws tiv thaiv thaum lub sij hawm ua hauj lwm los tiv thaiv kom qhuav cov nyhuv. Yog tias koj nchuav silica gel rau hauv koj lub qhov muag vim kev ua haujlwm tsis tu ncua, koj yuav tsum tau ntxuav koj ob lub qhov muag nrog dej ntau. Hauv qhov xwm txheej hnyav, koj yuav tsum mus rau tsev kho mob raws sijhawm. Raws li tau hais los saum no, cov xim ntawm silica gel txawv nyob rau hauv cov xwm txheej sib txawv thiab lub xeev. Ntawm lawv, xiav silica gel muaj ib qho me me ntawm cobalt chloride, uas muaj peev xwm ua rau muaj tshuaj lom. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tsis txhob sib cuag nrog zaub mov lossis nqus pa. Thaum nws nkag mus rau hauv lub cev, nws yog ib qho tsim nyog yuav tsum tau mus rau hauv tsev kho mob kom kho tau raws sijhawm. Yog tias silica gel adsorbs dej vapor lossis lwm cov organics hauv nruab nrab thaum hloov pauv, nws lub peev xwm adsorption yuav tsis muaj zog, tab sis nws tuaj yeem rov qab siv dua tom qab tsim dua tshiab.
Dab tsi yog qhov txawv ntawm Nitrile Roj Hmab thiab Silicone Roj Hmab?
Qhov sib txawv ntawm qhov muaj pes tsawg leeg:
-Ob hom roj hmab tseem ceeb yog silicone thiab nitrile roj hmab. Ob leeg muaj lawv tus kheej cov khoom tshwj xeeb uas ua rau lawv haum rau kev siv sib txawv.
Silicone roj hmab yog tsim los ntawm ib tug polymer ntawm silicon, oxygen, thiab lwm yam, xws li carbon thiab hydrogen. Nws yog cov roj hmab hluavtaws uas hloov tau, ruaj, thiab kub-resistant. Nws tuaj yeem siv rau hauv ntau hom kev siv, xws li cev thiab hoses, hluav taws xob rwb thaiv tsev, cookware, khoom siv kho mob, thiab cov nplaum.
Nitrile roj hmab yog tsim los ntawm copolymer ntawm acrylonitrile thiab butadiene. Nws yog cov roj hmab hluavtaws uas muaj roj-resistant thiab muaj zog txhua yam zoo. Nws tuaj yeem siv tau rau hauv ntau daim ntawv thov uas yuav tsum tau tiv thaiv cov roj los yog tshuaj, xws li cov ntsaws ruaj ruaj hauv tsheb cav thiab gaskets hauv cov kav dej.
Qhov txawv ntawm Cov Khoom:
-Silicone thiab nitrile roj hmab yog ob qho tib si hluavtaws elastomers. Lawv qhia ntau yam khoom, tab sis muaj qee qhov sib txawv ntawm lawv.
Ib qho ntawm cov kev sib txawv tseem ceeb tshaj plaws yog silicone yog ib qho inorganic polymer, thaum nitrile roj hmab yog cov organic polymer. Qhov sib txawv no tshwm sim los ntawm qhov tseeb tias silicone muaj silicon - metalloid - raws li nws cov pob txha, thaum nitrile roj hmab lub nraub qaum muaj cov pa roj carbon atoms.
Cov tshuaj sib txawv ntawm silicone thiab nitrile roj hmab ua rau muaj qee qhov sib txawv ntawm lub cev. Silicone muaj qhov ntom ntom dua li cov roj hmab nitrile, txhais tau tias nws sib dua. Nws kuj muaj qhov siab dua Young's modulus, txhais tau tias nws nruj dua. Nyob rau hauv sib piv, nitrile roj hmab muaj zoo abrasion kuj thiab tsim kua muag zog dua silicone.
Kuj tseem muaj qee qhov kev ua tau zoo sib txawv ntawm ob cov ntaub ntawv no. Silicone tuaj yeem tiv taus qhov kub siab tshaj li nitrile roj hmab - txog 204 ° C piv rau 121 ° C rau nitrile roj hmab - ua rau nws zoo tagnrho rau siv nyob rau hauv high-kub ib puag ncig xws li kev siv tsheb. Nitrile roj hmab, ntawm qhov tod tes, ua tau zoo dua li silicone nyob rau hauv cov nqe lus ntawm roj thiab roj kuj; nws kuj tuaj yeem siv rau hauv kev sib cuag nrog cov khoom noj khoom haus yam tsis muaj kev ntshai ntawm kev sib kis.
Qhov txawv ntawm Durability:
-Nitrile roj hmab tsis tshua kim dua li silicone roj hmab, tab sis nws tsis ncab ntau npaum li cas thiab nws tsis zoo li. Silicone roj hmab yog kim dua li cov roj hmab nitrile, tab sis nws muaj ntau yam ntawm stretchiness thiab durability.
Qhov txawv ntawm Tear Resistance:
-Nitrile roj hmab muaj cov cua kub zoo thiab feem ntau siv rau hauv cov khoom uas yuav tsum tau tiv taus kub kub, xws li qhov cub mitts thiab hnab looj tes. Tab sis silicone roj hmab qhov kub tsis kam yog tsawg dua li cov roj hmab nitrile, qhov ntsuas kub ntawm silicone roj hmab feem ntau me dua li cov roj hmab nitrile.
Qhov txawv ntawm Abrasion Resistance:
-Cov ntaub ntawv no feem ntau siv ua ke vim tias lawv muaj cov khoom sib txawv uas tuaj yeem siv rau ntau yam kev siv. Piv txwv li, cov roj hmab nitrile tuaj yeem siv rau cov khoom uas yuav tsum tau tiv taus roj lossis dej, thaum silicone roj hmab zoo dua rau cov khoom uas yuav tsum tau tiv thaiv corrosion.
Qhov sib txawv hauv Kev Siv:
-Ib qhov sib txawv tseem ceeb ntawm silicone thiab nitrile roj hmab yog tias silicone yog cov roj hmab hluavtaws, thaum nitrile yog roj hmab ntuj. Qhov no txhais tau hais tias cov roj hmab nitrile yog tsim los ntawm latex, uas yog los ntawm cov nroj tsuag, thaum silicone yog tsim los ntawm cov khoom siv hluavtaws.
Qhov sib txawv ntawm qhov muaj pes tsawg leeg no ua rau muaj ntau yam khoom sib txawv rau txhua hom roj hmab. Piv txwv li, nitrile roj hmab tiv taus roj thiab tshuaj ntau dua li silicone. Silicone, ntawm qhov tod tes, muaj qhov kub thiab txias dua li nitrile.
Yog li, thaum xaiv ntawm silicone thiab nitrile roj hmab rau ib daim ntawv thov, nws yog ib qho tseem ceeb uas yuav tau xav txog dab tsi cov khoom tseem ceeb tshaj plaws rau cov hauj lwm tshwj xeeb ntawm tes.
Qhov txawv ntawm tus nqi:
-Muaj qee qhov laj thawj tseem ceeb vim li cas silicone raug nqi ntau dua li cov roj hmab nitrile. Ua ntej, silicone muaj qhov melting point ntau dua li cov roj hmab nitrile, uas txhais tau tias nws tuaj yeem tiv taus qhov kub thiab txias. Qhov thib ob, silicone yog ntau dua tiv taus degradation los ntawm UV teeb thiab lwm yam ib puag ncig. Thaum kawg, silicone yog cov khoom siv elastic dua li cov roj hmab nitrile, txhais tau tias nws tuaj yeem ncab ntxiv yam tsis muaj kev tawg.
Qhov txawv ntawm kev tsim khoom:
-Silicone roj hmab yog cov roj hmab hluavtaws ua los ntawm silicone, polymer ntawm silicon thiab oxygen. Silicone rubbers tau siv dav hauv kev lag luam vim tias lawv muaj ntau yam thiab ua haujlwm rau qhov kub thiab txias. Lawv yog siv nyob rau hauv txhua yam ntawm gaskets thiab seals mus rau hluav taws xob rwb thaiv tsev thiab cov cuab yeej kho mob.
Nitrile roj hmab, tseem hu ua Buna-N lossis NBR, yog cov roj hmab hluavtaws ua los ntawm nitrile, copolymer ntawm acrylonitrile thiab butadiene. Nitrile rubbers tiv taus cov roj, roj, thiab lwm yam tshuaj. Lawv yog siv rau hauv gaskets, ntsaws ruaj ruaj, hoses, thiab lwm yam khoom uas yuav tsum tau tiv thaiv cov roj.
Qhov txawv ntawm sustainability:
Thaum nws los txog rau kev ruaj khov, ob ntawm cov khoom siv nrov tshaj plaws yog silicone thiab nitrile roj hmab. Ob qho ntawm cov ntaub ntawv no muaj lawv tus kheej cov txiaj ntsig tshwj xeeb uas ua rau lawv zoo tagnrho rau kev siv sib txawv. Ntawm no yog ib daim ntawv qhia ceev ceev ntawm qhov sib txawv tseem ceeb ntawm ob cov khoom siv ruaj khov no:
-Silicone yog tsim los ntawm silicon, ib txwm tshwm sim uas tuaj yeem pom hauv cov xuab zeb thiab pob zeb. Nws kuj yog ib qho ntawm cov ntsiab lus ntau tshaj plaws nyob rau hauv lub ntiaj teb crust. Qhov no ua rau silicone yog ib qho khoom siv txuas ntxiv dua tshiab.
-Nitrile roj hmab yog tsim los ntawm cov roj av, cov khoom siv tsis tau txuas ntxiv dua tshiab. Txawm li cas los xij, cov roj hmab nitrile tuaj yeem siv rov qab rau hauv cov khoom tshiab thaum kawg ntawm nws txoj sia.
-Silicon muaj cov pa roj carbon tsawg heev piv rau lwm cov roj hmab hluavtaws. Qhov tseeb, kev tsim silicone emit 60% carbon dioxide tsawg dua li kev tsim cov roj hmab nitrile.
-Nitrile roj hmab tiv taus cua sov dua li silicone, ua rau nws zoo tagnrho rau cov ntawv thov uas muaj qhov kub thiab txias.
-Silicone muaj ntau yam ntawm qhov kub thiab txias (-40 ° C txog 230 ° C), ua rau nws haum rau ob qho tib si txias thiab kub.
-Nitrile roj hmab tiv taus ntau dua li silicone, ua rau nws zoo tagnrho rau cov ntawv thov uas hnav thiab tsim kua muag muaj kev txhawj xeeb.
Qhov txawv ntawm recyclability:
-Muaj ntau qhov sib txawv ntawm silicone thiab nitrile roj hmab, tab sis qhov sib txawv ntawm qhov tseem ceeb yog silicone yog recyclable thaum nitrile roj hmab tsis yog. Silicone tuaj yeem rov ua dua los ntawm cov txheej txheem hu ua pelletization, qhov twg cov khoom yog yaj thiab tsim rau hauv cov pellets me me uas tuaj yeem siv los tsim cov khoom tshiab. Nitrile roj hmab, ntawm qhov tod tes, tsis tuaj yeem rov ua dua li no vim nws cov qauv tshuaj. Qhov no txhais tau hais tias thaum cov khoom siv roj hmab nitrile pov tseg, lawv yuav mus rau hauv qhov chaw pov tseg uas lawv yuav siv sijhawm ntau xyoo los rhuav tshem.
Pros thiab cons sib piv:
Nitrile roj hmab thiab silicone roj hmab yog ob hom roj hmab uas feem ntau siv rau hauv kev siv sib txawv. Nitrile roj hmab yog cov khoom siv softer, hloov tau ntau dua li cov roj hmab silicone, uas ua rau nws zoo dua rau qee qhov kev siv. Nitrile roj hmab kuj muaj lub neej expectancy ntev dua li silicone roj hmab. Qee qhov sib txawv tseem ceeb ntawm nitrile thiab silicone roj hmab muaj xws li:
xaus
Nitrile thiab silicone yog ob hom roj hmab uas feem ntau siv rau hauv cov khoom vim lawv muaj cov khoom sib txawv. Nitrile roj hmab yog ib qho tawv, hluavtaws roj hmab uas tsis yoog raws li silicone. Nws kuj tsis tshua muaj qhov tawg hauv tshav ntuj lossis huab cua thiab tuaj yeem ua vulcanized (ua rau hauv cov khoom siv tawv) ntawm qhov kub thiab txias. Silicone roj hmab, ntawm qhov tod tes, yog hloov tau yooj yim thiab tuaj yeem tiv taus qhov kub thiab txias. Nws kuj tseem ua rau fading thiab discoloration dua li cov roj hmab nitrile.
Tau kawg, kev xaiv ntawm cov ntaub ntawv yuav ib txwm muaj qhov sib txawv rau cov kev lag luam sib txawv. Qhov tseem ceeb tshaj plaws yog cov tuam txhab lag luam yuav tsum xaiv cov khoom sib txawv raws li lawv tus kheej xav tau.
