Cov yam ntxwv thiab kev ua tau zoo ntawm Nitrile Rubber

Cov lus piav qhia ntxaws txog cov yam ntxwv ntawm nitrile roj hmab

Nitrile roj hmab yog ib qho copolymer ntawm butadiene thiab acrylonitrile, thiab nws cov ntsiab lus acrylonitrile ua ke muaj kev cuam tshuam loj heev rau nws cov khoom siv, cov nplaum nplaum, thiab cov cua sov.Raws li cov yam ntxwv ntawm butadiene thiab acrylonitrile monomers, butadiene muaj zog polarity, thaum acrylonitrile muaj zog polarity.Yog li ntawd, cov ntsiab lus acrylonitrile ntau dua ntawm cov saw tseem ceeb ntawm cov roj hmab nitrile, qhov kev hloov pauv ntawm cov saw tseem ceeb yog qhov tsis zoo.Qhov siab dua qhov qis-kub brittleness kub, qhov ua haujlwm tsis zoo ntawm qhov kub thiab txias;Ntawm qhov tod tes, acrylonitrile muaj cov cua sov zoo vim tias thaum lub sijhawm cua sov, acrylonitrile hauv nitrile roj hmab tuaj yeem tsim cov dej cawv soluble los tiv thaiv thermal oxidative degradation.Yog li ntawd, lub tshav kub tsis kam ntawm nitrile roj hmab nce nrog nce ntawm acrylonitrile cov ntsiab lus;Lub caij no, vim yog qhov polarity ntawm acrylonitrile, nce cov ntsiab lus ntawm acrylonitrile tuaj yeem txhim kho lub zog nplaum ntawm nitrile roj hmab.Yog li ntawd, nws yog ib qho tseem ceeb heev los ntsuam xyuas cov ntsiab lus ntawm khi acrylonitrile hauv nitrile roj hmab.

Cov ntsiab lus ntawm acrylonitrile muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm NBR.Cov ntsiab lus acrylonitrile ntawm acrylonitrile nitrile roj hmab yog nruab nrab ntawm 15% thiab 50%.Yog tias cov ntsiab lus acrylonitrile nce mus txog 60%, nws yuav tawv, zoo ib yam li tawv, thiab tsis muaj cov khoom siv roj hmab ntxiv lawm.

1. Roj kuj thiab hnyav tsis kam: Nitrile roj hmab muaj roj kuj nyob rau hauv cov roj hmab zoo tib yam.Nitrile roj hmab muaj zog tiv taus roj av, benzene, thiab lwm yam uas tsis yog-polar hnyav dua li cov roj hmab ntuj, styrene butadiene roj hmab, butyl roj hmab, thiab lwm yam roj hmab uas tsis yog-polar, tab sis nws kuj zoo dua li cov roj hmab polar chlorinated.Txawm li cas los xij, cov roj hmab nitrile muaj qhov tsis zoo rau cov roj polar thiab cov kuab tshuaj (xws li ethanol), tab sis tsis zoo rau cov roj hmab uas tsis yog-polar.

2. Cov yam ntxwv ntawm lub cev ua haujlwm: Nitrile roj hmab yog cov qauv sib txawv ntawm nitrile copolymer uas tsis crystallize nyob rau hauv nro.Yog li ntawd, lub cev thiab txhua yam khoom ntawm ntshiab nitrile roj hmab vulcanized roj hmab yog tib yam li cov roj hmab styrene nitrile, deb tshaj li cov roj hmab ntuj.Tom qab ntxiv cov khoom ntxiv ntxiv xws li carbon dub thiab phenolic resin, lub zog tensile ntawm nitrile vulcanized roj hmab tuaj yeem ncav cuag qib ntawm cov roj hmab ntuj, feem ntau nyob ib ncig ntawm 24.50mpa.Raws li cov ntsiab lus polarity ntawm NBR nce, qhov hloov pauv ntawm cov saw hlau macromolecular txo qis, lub zog atomic ntawm molecules nce, ob daim ntawv cog lus txo qis, thiab cov saw hlau macromolecular tsis txaus, ua rau muaj kev hloov pauv ntawm kev ua haujlwm.Thaum ACN cov ntsiab lus nyob nruab nrab ntawm 35% thiab 40%, nws yog qhov tseem ceeb rau compression deformation, elasticity, thiab hardness ntawm 75 ℃.Yog tias cov roj ua tau raws li qhov yuav tsum tau ua, ntau yam nrog ACN tsawg dua 40% yuav tsum tau siv ntau li ntau tau.Lub elasticity ntawm nitrile roj hmab yog me dua li cov roj hmab ntuj thiab styrene butadiene roj hmab.Lub elasticity ntawm NBR yog ze ze rau qhov kub thiab txias.Piv rau NBR, qhov tshwm sim ntawm qhov kub thiab txias thiab elasticity nce yog ntau dua.Yog li ntawd, nitrile roj hmab yog heev haum rau manufacturing shock absorbers nrog siab roj kuj.Cov yam ntxwv ntawm elasticity ntawm nitrile roj hmab hloov nrog kev khi ntawm acrylonitrile

3. Kev ua pa: Nitrile roj hmab muaj huab cua zoo dua li cov roj hmab ntuj thiab styrene butadiene roj hmab, tab sis nws tsis zoo li cov roj hmab polysulfide, uas zoo ib yam li roj hmab butyl.

4. Kev ua haujlwm kub qis: Nitrile roj hmab muaj qhov ua haujlwm tsis zoo ntawm qhov kub thiab txias hauv cov roj hmab dav dav.Qhov ntsuas kub qis yog cuam tshuam nrog cov ntsiab lus ntawm acrylonitrile, thiab cov iav hloov pauv kub nce nrog qhov nce ntawm cov ntsiab lus acrylonitrile.Nws tuaj yeem txo cov iav hloov pauv kub ntawm nitrile roj hmab thiab txhim kho nws qhov kev ua haujlwm kub qis.

5. Thaum tshav kub kub tsis kam: Nitrile roj hmab muaj cua sov zoo dua li cov roj hmab ntuj thiab styrene butadiene roj hmab.Los ntawm kev xaiv cov qauv tsim nyog, cov khoom siv roj hmab nitrile tuaj yeem siv tsis tu ncua ntawm 120 ℃;tuaj yeem tiv taus roj kub ntawm 150 ℃;Tom qab soaking hauv roj ntawm 191 ℃ rau 70 teev, nws tseem muaj peev xwm khoov.6. Ozone tsis kam: Nitrile roj hmab muaj cov ozone tsis zoo thiab feem ntau txhim kho los ntawm kev ntxiv cov tshuaj tiv thaiv ozone.Txawm li cas los xij, cov khoom uas tuaj rau hauv kev sib cuag nrog roj thaum siv yog nquag tshem tawm ozone resistant tus neeg sawv cev thiab poob nws ozone kuj.Ua ke nrog PVC, cov nyhuv yog qhov tseem ceeb.

7. Dej tsis kam: Nitrile roj hmab muaj dej zoo dua.Qhov siab dua cov ntsiab lus ntawm acrylonitrile, qhov zoo dua nws cov dej tsis kam.

8. Hluav taws xob rwb thaiv tsev kev ua tau zoo: Nitrile roj hmab muaj hluav taws xob rwb thaiv tsev tsis zoo vim nws qhov polarity.Nws belongs rau cov roj hmab semiconductor thiab yuav tsum tsis txhob siv los ua cov khoom siv rwb thaiv tsev.

9. Kev laus tsis kam: NBR tsis muaj cov tshuaj tiv thaiv kev laus muaj kev laus tsis zoo, thaum NBR nrog cov tshuaj tiv thaiv kev laus tau zoo dua qub thiab kub ua haujlwm dua li cov roj hmab ntuj.Tom qab thermal oxidative laus, lub zog tensile ntawm ntuj roj hmab txo qis, tab sis qhov txo qis hauv nitrile roj hmab yog qhov tsawg heev.

Lub tshav kub tsis kam ntawm nitrile roj hmab yog tib yam li nws cov aging kuj.Thaum L0000H muaj hnub nyoog ntawm 100 ℃, nws elongation tseem tuaj yeem tshaj 100%.Cov khoom siv roj hmab Nitrile tuaj yeem siv rau lub sijhawm luv luv ntawm 130 ° C thiab tuaj yeem siv rau qhov kub siab dua yam tsis muaj oxygen.Yog li ntawd, cov roj hmab nitrile muaj cov cua sov zoo dua li cov roj hmab ntuj thiab cov roj hmab styrene butadiene.Txawm ntau tshaj li chloroprene roj hmab.Nitrile roj hmab muaj tib lub huab cua thiab ozone kuj zoo li cov roj hmab ntuj, tab sis me ntsis qis dua cov roj hmab ntuj.Ntxiv polyvinyl chloride rau nitrile roj hmab tuaj yeem txhim kho nws cov huab cua tsis kam thiab ozone tsis kam.

10. Radiation kuj:

Nitrile roj hmab kuj tseem tuaj yeem raug puas tsuaj nyob rau hauv hluav taws xob nuclear, ua rau muaj zog ntxiv thiab txo qis elongation.Txawm li cas los xij, piv rau lwm cov roj hmab hluavtaws, NBR tsis tshua cuam tshuam los ntawm hluav taws xob, thiab NBR nrog cov ntsiab lus acrylonitrile ntawm 33% -38% muaj hluav taws xob zoo.Tom qab hluav taws xob nuclear, lub zog tensile ntawm NBR nrog cov ntsiab lus acrylonitrile siab tuaj yeem nce 140%.Qhov no yog vim NBR nrog cov ntsiab lus acrylonitrile tsawg yuav degrade nyob rau hauv hluav taws xob, thaum NBR nrog siab acrylonitrile cov ntsiab lus yuav undergo crosslinking cov tshuaj tiv thaiv nyob rau hauv nuclear hluav taws xob.

Cov lus ua haujlwm ntawm Nitrile Rubber

Cov khoom siv feem ntau siv hluavtaws roj hmab