Synthetic roj hmab yog ib qho ntawm peb cov khoom siv hluavtaws loj thiab tau siv dav hauv ntau yam kev lag luam, kev tiv thaiv hauv tebchaws, kev thauj mus los thiab kev ua neej nyob txhua hnub.Kev ua haujlwm siab thiab kev ua haujlwm zoo ntawm cov roj hmab hluavtaws yog cov khoom siv tseem ceeb tshaj plaws uas tsim nyog rau kev txhim kho lub sijhawm tshiab, thiab nws kuj yog ib qho tseem ceeb ntawm cov khoom siv rau lub teb chaws.
Cov khoom siv roj hmab tshwj xeeb xa mus rau cov khoom siv roj hmab uas txawv ntawm cov khoom siv roj hmab thiab muaj cov khoom tshwj xeeb xws li kub thiab kub tsis kam, kev laus tiv thaiv, ablation tsis kam, thiab tshuaj tiv thaiv, feem ntau hydrogenated nitrile roj hmab (HNBR), thermoplastic vulcanizate (TPV) , Silicone roj hmab, fluorine roj hmab, fluorosilicone roj hmab, acrylate roj hmab, thiab lwm yam Vim nws cov khoom tshwj xeeb, cov khoom siv roj hmab tshwj xeeb tau dhau los ua cov ntaub ntawv tseem ceeb uas tsim nyog rau kev txhim kho cov tswv yim tseem ceeb hauv teb chaws thiab cov kev lag luam tawm tshiab xws li aerospace, kev tiv thaiv hauv teb chaws thiab kev lag luam tub rog, hluav taws xob cov ntaub ntawv, lub zog, ib puag ncig, thiab dej hiav txwv.
1. Hydrogenated nitrile roj hmab (HNBR)
Hydrogenated nitrile roj hmab yog cov khoom siv roj hmab uas muaj kuab heev uas tau txais los ntawm kev xaiv hydrogenating butadiene units ntawm nitrile roj hmab saw rau lub hom phiaj ntawm kev txhim kho cov cua sov thiab kev laus tiv thaiv ntawm nitrile butadiene roj hmab (NBR)., nws lub ntsiab feature yog hais tias nws yuav siv tau rau ib ntev lub sij hawm ntawm 150 ℃, thiab nws tseem muaj peev xwm tuav lub cev thiab txhua yam khoom ntawm qhov kub thiab txias, uas tuaj yeem ua tau raws li cov kev cai tshwj xeeb ntawm qhov kub thiab txias tsis kam ntawm cov khoom siv hauv tsheb. , aerospace, roj teb thiab lwm yam kev lag luam.Cov kev xav tau, ntau thiab ntau tau siv dav, xws li tsheb roj foob, cov khoom siv roj, tsheb sib kis siv, drilling tuav lub thawv thiab pistons rau av nkos, luam ntawv thiab textile roj hmab rollers, aerospace seals, cov ntaub ntawv poob siab, thiab lwm yam.
2. Thermoplastic Vulcanizate (TPV)
Thermoplastic vulcanizates, abbreviated li TPVs, yog ib chav kawm tshwj xeeb ntawm cov thermoplastic elastomers uas yog tsim los ntawm "dynamic vulcanization" ntawm immiscible blends ntawm thermoplastics thiab elastomers, piv txwv li kev xaiv ntawm elastomer theem thaum yaj tov nrog cov thermoplastic sib deev cross-linking.Ib txhij vulcanization ntawm roj hmab theem nyob rau hauv lub xub ntiag ntawm ib tug crosslinking neeg sawv cev (tej zaum peroxides, diamines, sulfur accelerators, thiab lwm yam) thaum lub sij hawm yaj blending nrog thermoplastics ua rau ib tug dynamic vulcanizate nruam thermoplastic matrix muaj li ntawm dispersed crosslinked roj hmab cov hais nyob rau hauv lub theem, dynamic. vulcanization ua rau muaj kev nce hauv roj hmab viscosity, uas txhawb cov theem inversion thiab muab ib tug multiphase morphology hauv TPV.TPV muaj ob qho tib si kev ua haujlwm zoo ib yam li cov roj hmab thermosetting thiab kev ua haujlwm ceev ntawm cov thermoplastics, uas yog feem ntau tshwm sim hauv kev ua haujlwm siab / tus nqi sib piv, hloov tau yooj yim, lub teeb yuag, kev ua haujlwm kub ntau, kev ua haujlwm yooj yim, cov khoom zoo thiab qhov ruaj khov thiab rov ua dua tshiab, dav. siv nyob rau hauv automotive qhov chaw, fais fab kev tsim kho, ntsaws ruaj ruaj thiab lwm yam teb.
3. Silicone roj hmab
Silicone roj hmab yog ib yam tshwj xeeb ntawm hluavtaws roj hmab uas yog ua los ntawm linear polysiloxane tov nrog reinforcing fillers, functional fillers thiab additives, thiab ua ib tug network-zoo li elastomer tom qab vulcanization nyob rau hauv cua sov thiab siab tej yam kev mob.Nws muaj qhov kub thiab txias tsis kam, huab cua tsis kam, ozone tsis kam, arc tsis kam, hluav taws xob rwb thaiv tsev, noo noo tsis kam, huab cua permeability siab thiab physiological inertia.Nws muaj ntau yam kev siv hauv kev lag luam niaj hnub no, hluav taws xob thiab hluav taws xob, tsheb, kev tsim kho, kev kho mob, kev saib xyuas tus kheej thiab lwm yam kev lag luam, thiab tau dhau los ua ib qho tseem ceeb ntawm cov khoom siv ua haujlwm siab hauv aerospace, kev tiv thaiv thiab tub rog kev lag luam, kev tsim khoom ntse thiab lwm yam kev lag luam. .
4. fluorine roj hmab
fluorine roj hmab hais txog cov khoom siv roj hmab uas muaj fluorine uas muaj fluorine atoms ntawm cov pa roj carbon atoms ntawm cov saw tseem ceeb lossis cov saw hlau sab.Nws cov khoom tshwj xeeb yog txiav txim siab los ntawm cov yam ntxwv ntawm cov fluorine atoms.Cov roj hmab fluorine tuaj yeem siv tau ntawm 250 ° C rau lub sijhawm ntev, thiab qhov kev pabcuam siab tshaj plaws tuaj yeem ncav cuag 300 ° C, thaum qhov kev pabcuam kub ntawm cov tsoos EPDM thiab butyl roj hmab tsuas yog 150 ° C.Ntxiv nrog rau qhov kub thiab txias tsis kam, fluororubber muaj cov roj zoo heev, tshuaj lom neeg tsis kam, acid thiab alkali tsis kam, thiab nws cov kev ua tau zoo yog qhov zoo tshaj plaws ntawm tag nrho cov khoom siv roj hmab elastomer.Nws yog tsuas yog siv rau roj tsis kam ntawm foob pob hluav taws, cuaj luaj, aircraft, nkoj, tsheb thiab lwm yam tsheb.Lub hom phiaj tshwj xeeb xws li kev sib khi thiab cov kav dej tsis muaj roj yog cov khoom tseem ceeb uas tsis tau muaj rau kev lag luam hauv lub tebchaws thiab kev tiv thaiv hauv tebchaws thiab kev lag luam tub rog.
5. Acrylate roj hmab (ACM)
Acrylate roj hmab (ACM) yog ib qho elastomer tau los ntawm copolymerization ntawm acrylate ua lub ntsiab monomer.Nws cov saw tseem ceeb yog cov saw hlau saturated carbon, thiab nws cov pab pawg sab nrauv yog pawg polar ester.Vim nws cov qauv tshwj xeeb, nws muaj ntau yam zoo heev, xws li kub tsis kam, kev laus ua haujlwm, roj tsis kam, ozone tsis kam, UV tsis kam, thiab lwm yam, nws cov khoom siv kho tshuab thiab cov khoom ua haujlwm zoo dua li fluororubber thiab silicone roj hmab, thiab nws cov cua sov ua haujlwm. , aging kuj thiab roj kuj zoo heev.hauv nitrile roj hmab.ACM yog dav siv nyob rau hauv ntau yam kub-kub thiab roj-resistant ib puag ncig, thiab tau dhau los ua cov khoom sib khi tsim thiab txhawb nqa los ntawm kev lag luam tsheb hauv xyoo tas los.
Post lub sij hawm: Sep-27-2022