Cov roj hmab tshwj xeeb hais txog cov roj hmab uas muaj cov khoom tshwj xeeb. Muaj:
1 neoprene roj hmab. Raws li CR, nws yog npaj los ntawm polymerization ntawm chloroprene. Muaj kev ua tau zoo tag nrho, roj, hluav taws kub, oxidation thiab ozone kuj. Txawm li cas los xij, nws qhov ntom yog qhov tseem ceeb, nws yog qhov yooj yim rau crystallize thiab nyuaj ntawm qhov kub thiab txias, thiab cov khoom lag luam txias tsis zoo.
2 nitrile roj hmab. Raws li NBR, nws yog npaj los ntawm copolymerization ntawm butadiene thiab acrylonitrile. Cov roj zoo thiab kev laus ua haujlwm, kev siv lub sijhawm ntev hauv huab cua ntawm 120 ° C lossis hauv cov roj ntawm 150 ° C. Tsis tas li ntawd, nws muaj dej tsis kam, huab cua nruj thiab cov khoom sib txuas zoo heev.
3 silicone roj hmab. Cov saw tseem ceeb yog tsim los ntawm kev sib hloov ntawm silicon oxide atoms nrog ib pawg organic ntawm silicon atom. Kub kub tsis kam, ozone kuj thiab hluav taws xob rwb thaiv tsev.
4 fluoro roj hmab. Cov roj hmab hluavtaws uas muaj fluorine atom hauv nws cov qauv molecular. Nws feem ntau yog sawv cev los ntawm tus naj npawb ntawm fluorine atoms ntawm chav tsev uas muaj fluorine nyob rau hauv cov copolymer, xws li fluororubber 23, uas yog ib tug copolymer ntawm vinylidene fluoride thiab chlorotrifluoroethylene. Fluororubber tiv taus qhov kub thiab txias, roj thiab tshuaj lom neeg.
5 polysulfide roj hmab. Nws yog tsim los ntawm polycondensation ntawm dihaloalkane nrog alkali hlau los yog alkaline ntiaj teb hlau polysulfide. Nws muaj cov roj zoo heev thiab hnyav hnyav, tab sis nws lub zog tsis siab, nws txoj kev laus ua haujlwm, kev ua haujlwm tsis zoo, thiab nws muaj ntxhiab tsw. Nws yog feem ntau siv ua ke nrog nitrile roj hmab. Tsis tas li ntawd, muaj urethane roj hmab, chlorohydrin roj hmab, acrylate roj hmab, thiab lwm yam.