YEthylene vs Propylene Glycol
Ethylene glycol thiab propylene glycol yog cov organic tebchaw nrog cawv ua haujlwm. Lo lus "glycol" yog siv thaum muaj ob pawg hydroxyl tam sim no nyob rau hauv cov atoms nyob sib ze. Lawv cov qauv molecular txawv; yog li lawv muaj qee qhov sib txawv ntawm lub cev. Txawm li cas los xij, thaum xav txog kev siv, ob qho tib si siv rau tib lub hom phiaj.
Ethylene Glycol
Ethylene glycol yog cov organic compound nrog ob lub atoms thiab ob pawg hydroxyl. Txhua pawg hydroxyl yog cais txuas rau ib qho carbon atom. Lub npe IUPAC ntawm ethylene glycol yog Ethane-1, 2-diol. Nws muaj cov qauv hauv qab no.
Ethylene glycol yog cov kua uas tsis muaj ntxhiab, tsis muaj xim, qab zib saj thiab zoo li syrupy. Nws molar mass yog 62.07 g mol−1. Ethylene glycol muaj qhov melting point ntawm 197.3 ° C. Nws yog miscible nrog dej.
Ethylene glycol yog tsim los ntawm ethene. Qhov nruab nrab yog ethylene oxide thiab, thaum nws reacted nrog dej, ethylene glycol yog tsim.
Ethylene glycol muaj txiaj ntsig zoo li tshuaj tiv thaiv kab mob hauv cov cua txias thiab cua sov. Nws kuj yog siv los ua cov kuab tshuaj hauv cov xim thiab cov khoom lag luam yas. Nws yog nyob rau hauv tus cwj mem siv los ntawm cov tshuab luam ntawv, thiab nyob rau hauv stamp ncoo number case, Ballpoint cwjmem thiab lwm yam. Ntxiv ethylene glycol yog pab tau raws li industrial humectants, nyob rau hauv hydraulic nres kua, thiab raws li ib tug cov khoom ntawm electrolytic condensers. Ntxiv mus, nws yog siv nyob rau hauv lub synthesis ntawm hluavtaws fibers, plasticizers, kev ruaj ntseg explosives, hluavtaws waxes thiab lwm yam.
Thaum tuav cov ethylene glycol tib neeg yuav tsum ceev faj vim nws yog tshuaj lom. Kev noj ntau ntawm ethylene glycol tuaj yeem ua rau ntuav, coma, ua pa tsis ua haujlwm, convulsions, metabolic hloov pauv, cuam tshuam hauv plawv thiab lwm yam.
Y Propylene Glycol
Propylene glycol kuj yog cov organic molecule nrog ob pawg hydroxyl, tab sis nws muaj peb carbon atoms. Cov pawg hydroxyl txuas nrog rau thawj thiab thib ob carbon atoms. Yog li, IUPAC lub npe ntawm propylene glycol yog 1, 2-propanediol lossis propane-1, 2, diol. Nws muaj cov qauv hauv qab no. Nws muaj chiral carbon (3 rdcarbon atom), yog li ntawd, propylene glycol muaj nyob rau hauv ob lub stereoisomers. Yog li thaum tsim khoom hauv kev lag luam, kev sib tw racemic tau tshwm sim.
Propylene glycol yog cov kua nplaum uas tsis muaj ntxhiab tsw lossis xim. Nws muaj qhov tsw qab zib. Propyelene glycol yog miscible nrog dej nrog rau chloroform thiab acetone. Nws qhov hnyav yog 76.09 g / mol. Boiling point ntawm propylene glycol yog 188.2 ° C.
Propylene glycol yog tsim los ntawm propylene oxide. Cov molecule no muaj ntau yam siv. Nws yog siv los ua ib qho hnyav hauv kev lag luam kws tshuaj. Nws kuj tseem siv los ua cov khoom noj khoom haus humectants, ua tus neeg sawv cev emulsification, ua cov tshuaj tiv thaiv kab mob, ua kua hauv hydraulic presses, raws li moisturizer nyob rau hauv cov tshuaj, raws li ib tug coolant, raws li ib tug lubricant. Nws kuj yog siv los tsim cov tshuaj polyester, hauv cov tshuab pa luam yeeb, tshuaj ntxuav tes, tshuaj pleev ib ce, thiab lwm yam.
Qhov txawv ntawm Ethylene Glycol thiab Propylene Glycol yog dab tsi?
• Ethylene glycol muaj ob lub carbon atoms thiab propylene glycol muaj peb carbon atoms.
• Ethylene glycol muaj cov tshuaj formula C2H6O2. Propylene muaj cov tshuaj formula C3H8O2.
• Ethylene glycol muaj tshuaj lom ntau dua li propylene glycol.
• Yog li thaum yuav tsum muaj cov khoom muaj kev nyab xeeb hauv kev lag luam, ethylene glycol hloov nrog propylene glycol.
