Qhov sib txawv tseem ceeb ntawm NBR thiab HNBR yog NBR yog daim ntawv tsis muaj hydrogenated, hos HNBR yog daim ntawv hydrogenated.
NBR yog daim ntawv luv luv ntawm nitrile roj hmab. HNBR yog hydrogenated daim ntawv ntawm nitrile roj hmab. Nws yog ib qho hluavtaws copolymer ntawm acrylonitrile thiab butadiene. HNBR los yog hydrogenated nitrile roj hmab yog dav siv vim nws lub cev muaj zog thiab tuav cov khoom txawm tias tom qab raug tshav kub, roj, thiab tshuaj.
NBR yog dab tsi?
NBR lossis nitrile roj hmab yog copolymer ntawm acrylonitrile thiab butadiene. Nws yog cov khoom siv hluavtaws polymer. Cov npe lag luam feem ntau ntawm NBR yog Perbunan, Nipol, Krynac, thiab Europrene. Lub sij hawm NBR stands rau nitrile butadiene roj hmab. Cov khoom no los nyob rau hauv tsev neeg ntawm unsaturated copolymer ntawm 2-propenenitrile. Feem ntau, cov khoom siv polymer no tiv taus cov roj, roj thiab ntau lwm yam tshuaj.
Thaum xav txog kev tsim NBR, cov tshuaj tiv thaiv sib xyaw yuav tsum muaj emulsifier, 2-propenenitrile, butadiene monomer, radical generating activators, thiab catalyst. Cov tshuaj tiv thaiv nruab nrab rau cov tshuaj tiv thaiv tshwj xeeb no yog dej. Qhov kub uas siv rau hauv cov txheej txheem tsim khoom no yog ze li ntawm chav tsev kub lossis me ntsis saum toj no. Cov tshuaj tiv thaiv no ua kom yooj yim polymerization thiab ceg tsim hauv cov khoom siv polymer.
Nyob hauv nws lub xeev nyoos, NBR muaj xim daj. Qee zaum, nws tuaj yeem tshwm hauv txiv kab ntxwv, lossis ua cov khoom siv liab-tinted. Feem ntau, cov khoom no qhia tau hais tias muaj kev tiv thaiv zoo rau cov roj ntxhia, roj zaub, benzene, roj av, dilute acids thiab alkaline solvents. Qhov tseem ceeb tshaj, qhov piv ntawm acrylonitrile pawg rau cov pab pawg butadiene hauv cov pob txha polymer, hu ua ACN cov ntsiab lus, yog qhov tseem ceeb hauv kev txiav txim siab qhov kub hloov pauv iav ntawm cov khoom no.
Daim duab 01: Ib Lub hnab looj tes pov tseg ua los ntawm NBR
Muaj ntau yam kev siv NBR. Piv txwv li, tsim cov hnab looj tes uas tsis yog-latex, siv tsheb thauj mus los, hoses, O-rings, gaskets, roj foob, V siv, qee cov ntaub ntawv roj hmab hluavtaws, cov nplaum, ua cov pigment bonder, thiab lwm yam yog siv NBR.
HNBR yog dab tsi?
Lub sij hawm HNBR sawv cev rau hydrogenated nitrile butadiene roj hmab. Nws yog li no hydrogenated daim ntawv ntawm nitrile roj hmab. Cov khoom no tseem hu ua nitrile saturated heev, xav txog cov tshuaj muaj pes tsawg leeg ntawm cov khoom siv polymer. Cov khoom no tseem ceeb heev vim nws cov khoom muaj txiaj ntsig zoo xws li lub zog siab, tuav cov khoom thaum raug tshav kub, roj, thiab tshuaj.
Muaj ntau daim ntawv thov ntawm HNBR. Cov khoom siv no yog siv dhau NBR vim nws lub zog siab. Piv txwv li, cov khoom siv HNBR no feem ntau yog siv hauv tsheb, kev lag luam, thiab ntau yam, kev ua haujlwm-xav tau daim ntawv thov. Feem ntau, HNBR yog siv los tsim O-rings rau automotive air-conditioning systems.
Lub zog tensile ntawm HNBR feem ntau yog li ntawm 20-31 MPa ntawm qhov kub thiab txias (ib puag ncig 23 degrees Celsius). Txawm li cas los xij, cov txheej txheem sib xyaw ua ke ntawm HNBR tso cai rau nws siv ntawm qhov kub thiab txias. Tsis tas li ntawd, nws qhia tau tias tsawg kawg degradation nyob rau lub sij hawm ntev. Raws li daim ntawv thov, hom HNBR siv txawv. Piv txwv li, qib qis ACN ntawm HNBR muaj txiaj ntsig zoo rau cov ntawv thov kub qis, thaum cov qib CAN siab tau pab tau rau cov ntawv thov kub.
Qhov txawv ntawm NBR thiab HNBR yog dab tsi?
NBR yog ib qho luv luv ntawm nitrile roj hmab thaum HNBR yog hydrogenated daim ntawv ntawm nitrile roj hmab. Qhov sib txawv tseem ceeb ntawm NBR thiab HNBR yog NBR yog daim ntawv tsis muaj hydrogenated, hos HNBR yog daim ntawv hydrogenated. Ntxiv mus, NBR muaj lub zog tensile qis piv rau HNBR.
Hauv qab infographic qhia ntau qhov sib piv ntsig txog qhov sib txawv ntawm NBR thiab HNBR.
Summary – NBR vs HNBR
Lub sij hawm NBR yog siv rau lub npe nitrile roj hmab. Qhov sib txawv tseem ceeb ntawm NBR thiab HNBR yog NBR yog daim ntawv tsis-hydrogenated, hos HNBR yog daim ntawv hydrogenated.
