Silicone roj yog ib hom polyorganosiloxane nrog cov saw zoo li cov qauv nrog ntau qib ntawm polymerization. Nws yog tsim los ntawm Dimethyldichlorosilane los ntawm hydrolysis nrog dej kom tau txais thawj lub nplhaib polycondensation. Lub nplhaib yog tawg thiab kho kom tau txais lub nplhaib qis. Tom qab ntawd lub nplhaib, tus neeg sawv cev capping thiab cov catalyst tau muab tso ua ke rau polymerization kom tau txais kev sib xyaw nrog cov txheej txheem sib txawv polymerization. Silicon roj tuaj yeem tsim los ntawm kev tshem tawm cov teeb meem kub kub los ntawm lub tshuab nqus tsev distillation.
Cov roj silicone feem ntau siv, pawg organic hu ua silicone roj. Organic pawg kuj tuaj yeem hloov qee pawg methyl nrog rau lwm pawg organic los txhim kho kev ua haujlwm ntawm cov roj silicone thiab tsim nyog rau ntau lub hom phiaj. Feem ntau lwm pab pawg muaj xws li hydrogen, chlorine, trifluoropropyl, thiab lwm yam. Nyob rau hauv xyoo tas los no, organic hloov silicone roj tau tsim sai heev, thiab ntau cov organic hloov silicone roj nrog cov khoom tshwj xeeb tau tshwm sim.
Silicone roj feem ntau yog xim tsis muaj xim (los yog lub teeb daj), pob tshab, thiab cov kua tsis hloov pauv. Silicone roj yog insoluble nyob rau hauv dej, methanol, diol, thiab - ethoxyethanol, thiab yuav miscible nrog benzene, dimethyl ether, carbon tetrachloride, los yog kerosene. Nws yog me ntsis soluble hauv, dioxane, ethanol, thiab methanol. Nws muaj qhov tsis tshua muaj vapor siab, siab flash thiab ignition point, thiab tsis tshua muaj qhov chaw khov. Raws li tus naj npawb ntawm cov saw ntu n nce, qhov hnyav molecular thiab viscosity kuj nce. Cov roj silicone no tuaj yeem muaj ntau yam viscosities, xws li ntawm 0.65 mus rau lab millimeters. Yog tias tsis tshua muaj viscosity silicone roj yuav tsum tau npaj, acidic av nplaum yuav siv tau los ua ib qho catalyst thiab polymerized ntawm 180 degree, los yog sulfuric acid tuaj yeem siv los ua catalyst thiab polymerized ntawm qhov kub thiab txias los tsim cov viscosity silicone roj los yog cov khoom viscous. Alkaline catalysts tuaj yeem siv tau.
Cov roj silicone tuaj yeem muab faib ua methyl silicone roj, ethyl silicone roj, phenyl silicone roj, methyl hydrogen muaj silicone roj, methyl phenyl silicone roj, methyl chlorophenyl silicone roj, methyl ethoxy silicone roj, methyl trifluoropropyl silicone roj, methyl vinyl silicone roj, methyl hydroxy silicone roj, ethyl hydrogen muaj silicone roj, hydroxyl hydrogen muaj silicone roj, cyanide muaj silicone roj, thiab lwm yam raws li lawv cov qauv tshuaj; Los ntawm qhov kev xav ntawm kev siv, muaj lubricating silicone roj, roj da dej silicone roj, damping silicone roj, diffusion twj silicone roj, hydraulic roj, rwb thaiv tsev roj, tshav kub hloov tsheb, roj nres, thiab lwm yam.
Silicone roj muaj cov cua kub zoo heev, hluav taws xob rwb thaiv tsev, huab cua tsis kam, hydrophobicity, physiological inertia thiab me me nro. Tsis tas li ntawd, nws muaj viscosity kub coefficient thiab siab Compressibility kuj. Qee hom kuj muaj hluav taws xob tiv thaiv. Taw qhia rau ntau yam thiab kev siv ntawm Silicone Roj Silicone roj yog ib hom polyorganosiloxane nrog sib txawv polymerization degree chain lug. Nws yog tsim los ntawm Dimethyldichlorosilane los ntawm hydrolysis nrog dej kom tau txais thawj lub nplhaib polycondensation. Lub nplhaib yog tawg thiab kho kom tau txais lub nplhaib qis. Tom qab ntawd lub nplhaib, tus neeg sawv cev capping thiab cov catalyst tau muab tso ua ke rau polymerization kom tau txais kev sib xyaw nrog cov txheej txheem sib txawv polymerization. Silicon roj tuaj yeem tsim los ntawm kev tshem tawm cov teeb meem kub kub los ntawm lub tshuab nqus tsev distillation.
Cov roj silicone feem ntau siv, nrog rau txhua pawg organic yog methyl, hu ua methyl silicone roj. Organic pawg kuj tuaj yeem hloov qee pawg methyl nrog rau lwm pawg organic los txhim kho kev ua haujlwm ntawm cov roj silicone thiab tsim nyog rau ntau lub hom phiaj. Feem ntau lwm pab pawg muaj xws li hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl, thiab lwm yam. Nyob rau hauv xyoo tas los no, organic hloov silicone roj tau tsim sai heev, thiab ntau cov organic hloov silicone roj nrog cov khoom tshwj xeeb tau tshwm sim.
