Dimethyl silicone roj, tseem hu ua methyl silicone roj, yog tsis muaj xim, pob tshab, oily kua nrog ntau hom kev lag luam.
Cov khoom tsim hauv tsev feem ntau raug xaiv raws li 201, nrog rau cov tshuaj formula MDnM, qhov twg M sawv cev rau methyl (-CH3) thiab D sawv cev rau dimethylsiloxane chav tsev.
Cov khoom ntawm Methyl Silicone Roj
Viscosity-Tsub Properties
Lub viscosity -kub coefficient ntawm methyl silicone roj yog qis dua li cov roj ntxhia, kwv yees li 0.6, txhais tau tias nws cov viscosity hloov tsawg dua nrog qhov kub thiab txias.
Compressibility thiab Lubricity
Methyl silicone roj muaj compressibility siab, tab sis qis dua cov roj ntxhia. Nws compressibility txo nrog nce molecular hnyav. Methyl silicone roj muaj siab heev shear resistance, ntau tshaj 20 npaug ntawm sab saum toj -qib ntxhia roj, ua rau nws zoo tagnrho rau siv los ua lubricant. Txawm hais tias nws yog ib qho nyuaj rau tsim ib tug ruaj khov lubricating zaj duab xis ntawm steel nto thiab tsis haum rau hnyav loads, nws ua tau zoo heev nyob rau hauv lubrication daim ntaub ntawv ntawm cov ntaub ntawv yas.
Kub Resistance
Methyl silicone roj muaj qhov ua tau zoo ntawm qhov kub thiab txias tsis kam, tso cai rau lub sijhawm ntev - siv nyob rau hauv ntau qhov kub ntawm -40℃txog 200 degree, muaj peev xwm tsis sib haum los ntawm cov roj ntxhia feem ntau. Nws qhia tau hais tias yuav luag tsis muaj oxidation hauv qab 150 degree, thiab txawm tias tom qab cua sov ntawm 200℃rau 16 teev, nws cov viscosity nce tsuas yog 10%. Txoj kev nyiam rau sab-chain oxidative crosslinking hauv methyl silicone roj tsuas yog ua qhov tseem ceeb thaum qhov kub siab tshaj 200 degree.
Kev Ua Ntog
Vim nws qhov tsis tshua muaj qhov nro, methyl silicone roj nthuav tawm cov dej ua haujlwm siab thiab hydrophobicity, ua rau nws muaj txiaj ntsig zoo defoamer thiab pwm tso tawm tus neeg sawv cev.
Thermophysical Properties
Methyl silicone roj muaj lub peev xwm ua kom sov tsawg, kwv yees li ib -peb ntawm cov dej. Nws cov thermal expansion yog ntau dua li cov dej thiab mercury, thiab zoo ib yam li cov benzene. Lub thermal conductivity ntawm methyl silicone roj nyob ntawm 0.14 txog 0.16 W / (m·K), kwv yees li ib feem ntawm cov dej.
Hluav taws xob rwb thaiv tsev cov khoom: Methyl silicone roj yog cov khoom siv hluav taws xob zoo heev nrog lub ntim tiv taus tshaj 1 × 10 ^ 14 Ω·cm thiab lub zog rwb thaiv tsev tshaj 14 kV / mm. Nws qhov dielectric tsis tu ncua (ε) yog nyob nruab nrab ntawm 2.64 thiab 2.75, thiab nws cov dielectric poob tangent (tanδ) tsawg dua 6 × 10^-4. Cov kev ntsuas no muaj qhov sib txawv me me tshaj qhov ntau zaus ntawm 10^3–10^7 Hz thiab qhov kub ntawm -40℃txog 150 degree.
