Qhov Tseem Ceeb - Neoprene vs EPDM
Neoprene thiab EPDM yog ob hom roj hmab hluavtaws uas tau siv dav hauv ntau hom kev lag luam niaj hnub no. Qhov sib txawv tseem ceeb ntawm neoprene thiab EPDM tshwm sim vim lawv cov qauv sib txawv. Lawv raug tsim nyob rau hauv ob txoj kev sib txawv kom lawv cov khoom thiab kev siv sib txawv raws li. Tab sis, ob qho tib si tseem ceeb sib npaug hauv kev lag luam niaj hnub siv hauv ntau qhov chaw.
Neoprene yog dab tsi?
Neoprene tseem hu ua "polychloropene" thiab yog ib tug tswv cuab ntawm tsev neeg roj hmab hluavtaws uas yog tsim los ntawm polymerization (Ib txheej txheem tshuaj tiv thaiv uas monomer molecules reacts ua ke los tsim polymer chains los yog peb seem tes hauj lwm) ntawm chloropene. Nws muaj nyob rau hauv kev ua lag luam xws li cov khoom siv roj hmab lossis hauv daim ntawv latex. Neoprene yog siv nyob rau hauv ntau hom kev lag luam; zoo li lub tshuab hluav taws xob, hauv lub tes tsho laptop, orthopedic braces, thiab tsheb kiv cua siv.
EPDM yog dab tsi?
EPDM yog cov khoom siv hluavtaws ua ethylene-propylene roj hmab thiab elastomer uas tau siv dav tshaj plaws hauv ob qho tib si kev siv lub hom phiaj thiab tshwj xeeb. Ntxiv mus, EPDM qhia tau hais tias zoo heev ib puag ncig thiab tshuaj resistant zog. EPDM yog lub npe hu ua M-class roj hmab vim nws muaj saturated chains ntawm polymethylene.
Qhov txawv ntawm Neoprene thiab EPDM yog dab tsi?
Kev Tsim Nyog Neoprene thiab EPDM:
Neoprene: Nws yog tsim los ntawm cov tshuaj dawb-radical polymerization ntawm chloroprene. Nws yog ua lag luam los ntawm cov dawb radical emulsion polymerization uas yog pib siv cov poov tshuaj persulfate. Kev sib txuas ntawm tus kheej polymer strands yog ua los ntawm kev siv bifunctional nucleophiles, hlau oxides (ZnO), thiab thioureas.
EPDM: Nws yog tsim los ua copolymer ntawm ethylene thiab propylene nrog me me ntawm cov pendant diene. Pendant diene yog ntxiv rau cross-link cov khoom. Qhov kev faib ua feem ntawm ethylene thiab propylene sib txawv nyob ntawm seb cov khoom xav tau.
Khoom ntawm Neoprene thiab EPDM:
Neoprene: Neoprene yog ib qho mos, hloov tau thiab ruaj khov zoo li cov roj hmab hluavtaws nrog cov yam ntxwv hauv qab no. Nws muaj cov dej zoo heev thiab huab cua tiv taus thiab kuj thermal thiab noo noo rwb thaiv tsev zog. Nws kuj nthuav tawm cov tshuaj tiv thaiv zoo rau cov tshuaj thiab roj (petroleum derivatives). Neoprene yog cov khoom siv stretchable thiab siv tau los ua cov khoom siv thiab cov khoom sib txawv.
EPDM: EPDM qhia tau zoo heev thaum tshav kub kub, ozone, thiab huab cua resistant zog. Tsis tas li ntawd, nws tsis kam mus rau cov polar tshuaj thiab cov chav dej kuj zoo. Nws cov khoom siv hluav taws xob hluav taws xob kuj tseem muaj qhov siab, thiab nws muaj qhov ua haujlwm zoo rau alkalines, ketones, thiab cov kua qaub diluted zoo tib yam.
Kev Siv Neoprene thiab EPDM:
Neoprene: Neoprene yog siv rau hauv ntau hom kev lag luam uas txawv ntawm qhov dav mus rau lub hom phiaj tshwj xeeb. Nws yog feem ntau siv hauv kev tsim kho kev lag luam, kev lag luam loj thauj mus los, kev lag luam tsheb, thiab kev lag luam hlau thiab cable.
EPDM: EPDM yog siv rau hauv kev sib khi ua cov khoom siv insulating; Piv txwv li, nyob rau hauv lub qhov rooj chav tsev, lub ntsej muag ntsaws ruaj ruaj nyob rau hauv industrial respirators nyob rau hauv automotive xim txau thaj chaw, nyob rau hauv tubing, pas dej hauv ob sab phlu, washers, siv, vibrators, solar vaj huam sib luag tshav kub collectors thiab hluav taws xob insulators.
EPDM yog siv los ua cov dej resistant nruab nrab nyob rau hauv hluav taws xob cable koom nrog thiab nyob rau hauv lub ru tsev daim nyias nyias vim nws tsis hnov tsw nrog dej thiab vim li no, nws tsis paug dej los nag. Nws yog ib qho tseem ceeb hauv kev sau cov dej nag.
Qee qhov ntawm lwm qhov chaw thov EPDM yog nyob rau hauv geo daim nyias nyias, thermoplastics, roj hmab txhua yam khoom thiab kev hloov pauv ntawm cov yas. Tsis tas li ntawd, cov xim EPDM tuaj yeem sib xyaw nrog polyurethane binders thiab tom qab ntawd troweled lossis txau rau hauv pob zeb, asph alt, kev tshuaj ntsuam xyuas, sib cuam tshuam cov cib thiab cov ntaub ntawv ntoo kom tau txais cov ntaub ntawv tsis plam, mos, ntxeem tau kev nyab xeeb hauv cov chaw ntub dej xws li cov pas dej da dej thiab hauv kev nyab xeeb hauv qab. Cov cuab yeej ua si hauv chaw ua si kom txo qis kev pheej hmoo ntawm kev raug mob poob.
