Viton FKM Viton
fluorine roj hmab yog cov roj hmab uas muaj fluorine hauv nws cov molecule. Muaj ntau hom nyob ntawm cov ntsiab lus fluorine (ie monomer qauv). Tam sim no dav siv hexafluorinated fluororubber yog thawj zaug los ntawm DuPont. Kev kub siab ua haujlwm zoo, tshuaj lom neeg ua haujlwm zoo, ua haujlwm rau feem ntau cov roj thiab cov kuab tshuaj (tshwj tsis yog ketones thiab esters), huab cua tsis kam thiab ozone kuj
Fluorine roj hmab (FKM) yog hais txog ib qho hluavtaws polymer elastomer uas muaj fluorine atoms ntawm cov pa roj carbon atoms ntawm cov saw tseem ceeb lossis cov saw hlau sab. Kev taw qhia ntawm fluorine atoms muab roj hmab zoo heev thaum tshav kub kub, oxidation tsis kam, roj kuj, corrosion kuj thiab atmospheric aging kuj. Nws tau dav siv hauv aerospace, aviation, tsheb, roj av thiab khoom siv hauv tsev thiab lwm yam. Nws yog ib qho kev tiv thaiv lub teb chaws cov ntaub ntawv tseem ceeb uas tsis tuaj yeem hloov pauv hauv kev lag luam.
Fluoroether roj hmab khoom:
tshuaj stability
Fluorine roj hmab muaj kev ruaj ntseg tshuaj lom neeg thiab muaj qhov zoo tshaj plaws kev tawm tsam ntawm tag nrho cov elastomers tam sim no. Hom 26 fluorine roj hmab yog resistant rau roj av-raws li roj, roj diester, silicone roj, silicic acid roj, inorganic acids, feem ntau organic thiab inorganic kuab tshuaj, tshuaj, thiab lwm yam, thiab tsuas yog tsis resistant rau low-molecular ketones, ethers, Ester. , tsis tiv taus amines, ammonia, hydrofluoric acid, chlorosulfonic acid, thiab phosphoric acid hydraulic roj. Cov khoom dielectric ntawm hom 23 fluorine roj hmab zoo ib yam li hom 26, thiab nws txawv dua. Nws kuj muaj zog oxidizing inorganic acids xws li fuming nitric acid thiab concentrated sulfuric acid yog zoo dua li hom 26. Nws tuaj yeem immersed hauv 98% HNO3 ntawm chav tsev kub. 27 Nws qhov ntim nthuav dav tsuas yog 13% ~ 15%.
Kub kub kuj
1. Cov roj hmab fluorine muaj qhov kub thiab txias zoo heev thiab tuaj yeem siv tau ntev ntawm 180 degrees Celsius mus rau 220 degrees Celsius. Nws tuaj yeem siv rau lub sijhawm luv luv ntawm 250 degrees Celsius, tshwj xeeb tshaj yog VITON series tsim los ntawm DuPont, uas muaj kev ua tau zoo tshaj plaws hauv txhua yam.
2. The low-temperature performance of fluorine rubber is not good, which is due to its own chemical structure, such as the Tg of type 23-11>0 degree. Qhov ntsuas kub qis ntawm fluororubber siv tau yog feem ntau qhia los ntawm qhov kub thiab txias compression coefficient. Cov mis ntawm cov roj hmab sib xyaw thiab cov duab ntawm cov khoom (xws li thickness) muaj kev cuam tshuam ntau dua ntawm qhov kub thiab txias. Yog hais tias tus nqi ntawm cov muab tub lim nyob rau hauv cov mis nce, lub brittleness kub yuav deteriorate rhiab heev. Raws li lub thickness ntawm cov khoom nce, lub brittleness blending degree kuj yuav deteriorate rhiab heev. Shanghai Huayi muaj kev paub dhau los thiab cov kws tshaj lij cov neeg ua haujlwm uas tuaj yeem hloov kho cov roj hmab fluorine los ntawm cov qauv tsim los txhim kho qhov kub thiab txias tsis kam ntawm fluorine roj hmab.
Kev laus tsis kam
fluorine roj hmab muaj huab cua zoo tiv thaiv kev laus thiab ozone kuj. Tom qab kaum xyoo ntawm kev khaws cia ntuj, qhov kev ua tau zoo tseem yog qhov txaus siab, thiab tsis muaj qhov pom tseeb tawg tom qab 45 hnub hauv huab cua nrog cov ozone concentration ntawm 0.01%. Hom 23 fluororubber kuj muaj huab cua zoo tiv thaiv thiab ozone tsis kam.
Mechanical cwj pwm
Fluorine roj hmab muaj lub cev zoo thiab cov khoom siv kho tshuab. Lub zog dav dav ntawm hom 26 fluorine roj hmab yog nyob nruab nrab ntawm 10 thiab 20MPa, qhov elongation ntawm kev tawg yog nyob nruab nrab ntawm 150 thiab 350%, thiab lub kua muag tawm ntawm 3 thiab 4KN / m. Lub zog ntawm hom 23 fluorine roj hmab yog nyob nruab nrab ntawm 15.0 thiab 25MPa, qhov elongation yog nruab nrab ntawm 200% thiab 600%, thiab lub kua muag tsis kam yog nruab nrab ntawm 2 thiab 7MPa. Feem ntau hais lus, fluorine roj hmab muaj qhov loj compression mus tas li deformation ntawm qhov kub thiab txias. Txawm li cas los xij, yog tias muab piv rau tib lub sijhawm, xws li compression mus tas li deformation ntawm 150 degree rau tib lub sijhawm, cov roj hmab butyl thiab chloroprene loj dua li hom 26 fluorine roj hmab. Lub compression deformation ntawm hom 26 fluororubber ntawm 200 degree × 24 teev yog sib npaug rau compression deformation ntawm butadiene roj hmab ntawm 150 degree × 24 teev. Shanghai Huayi tuaj yeem siv cov txheej txheem kev tsim qauv, hloov kho cov ntaub ntawv, thiab muab cov khoom siv kho tshuab kom cov ntaub ntawv tuaj yeem nthuav tawm lub cev zoo.
Cov khoom hluav taws xob
Hom 23 fluororubber muaj cov khoom hluav taws xob zoo dua thiab qis hygroscopicity dua li lwm cov elastomers, yog li nws tuaj yeem siv los ua cov khoom siv hluav taws xob zoo dua. Hom 26 roj hmab tuaj yeem siv rau ntawm qhov tsawg zaus thiab tsis tshua muaj siab.
Tsawg breathability
Lub solubility ntawm fluorine roj hmab rau roj kuj loj, tab sis tus diffusion tus nqi kuj me me, yog li tag nrho breathability kuj me me. Kev ua pa ntawm hom 26 fluororubber rau oxygen, nitrogen, helium, thiab carbon dioxide gases ntawm 30 degree yog sib npaug rau butyl roj hmab thiab butyl roj hmab, thiab zoo dua li chloroprene thiab roj hmab ntuj.
Kev tiv thaiv hluav taws xob
Cov hluav taws xob tiv thaiv ntawm fluorine roj hmab yog qhov tsis zoo ntawm cov elastomers. Hom 26 roj hmab qhia tau hais tias muaj kev sib txuas sib txuas tom qab hluav taws xob, thiab hom 23 fluorine roj hmab qhia tau hais tias muaj kev tawg. Kev ua tau zoo ntawm hom 246 fluorine roj hmab hloov pauv loj heev nyob rau hauv ib txwm kub hluav taws xob hluav taws xob hauv huab cua ntawm koob tshuaj 5 × 107 Lun. Nyob rau hauv cov xwm txheej ntawm 1 × 107 Lun, hardness nce los ntawm 1 mus rau 3 degrees, lub zog txo qis dua 20%, thiab elongation txo los ntawm 30% mus rau 50%. , yog li nws feem ntau ntseeg tias hom 246 fluororubber tuaj yeem tiv taus 1 × 107 Lun, thiab qhov txwv yog 5 × 107 Lun.
Cov ntawv thov tseem ceeb thiab cov ntawv thov raug cai
Vim tias cov roj hmab fluorine muaj cov yam ntxwv ntawm qhov kub thiab txias tsis kam, roj tsis kam, siab lub tshuab nqus tsev, acid thiab alkali tsis kam, thiab tsis kam mus rau ntau yam tshuaj, nws tau siv dav hauv niaj hnub aviation, missiles, rockets, aerospace navigation, ships, atomic zog thiab lwm yam. Kev siv thev naus laus zis zoo li tsheb, nkoj tsim, tshuaj lom neeg, roj av, kev sib txuas lus, twj paj nruag, tshuab thiab lwm yam kev lag luam.
Kev lag luam tshuaj (muaj zog acid corrosion, muaj zog alkali corrosion, roj corrosion, organic hnyav corrosion, kub corrosion);
Mechanical kev lag luam (siab dua tensile zog thiab hardness)
Kev lag luam cav; chemical kev lag luam, sib sib zog nqus roj ntau lawm kev lag luam, chav ua hauj lwm industries;