Polyethylene Glycol/PEG/CAS:25322-68-3
Sharaxaad Gaaban:
Magaca Badeecada: Polyethylene Glycol
CAS:25322-68-2
MF:(C2H4O)nH2O
MW:0
QAAB-DHISMEEDKA:
Qeexitaan:
Polyethylene glycols waa qoys ka kooban polymers toosan oo ay sameeyeen falgal biyo-ku-shuban oo saldhig-ka-kicin ah iyadoo cutubyada ethylene oxide ee soo noqnoqda lagu daray ethylene. Qaacidada molecular-ka waa (C2H4O) multiH2O halkaas oo mult ay tilmaamayso tirada celceliska kooxaha oxyethylene. Miisaanka molecular-ka wuxuu u dhexeeyaa 200 ilaa dhowr milyan oo u dhigma tirada kooxaha oxyethylene. Alaabada miisaanka sare leh ee molecular-ka (100 000 ilaa 5 000 000) waxaa sidoo kale loo yaqaan polyethylene oxides. Celceliska miisaanka molecular-ka ee wax soo saar kasta oo gaar ah oo polyethylene glycol ah wuxuu ku dhacaa xad aad u cidhiidhi ah (°5%). Tirada cutubyada ethylene oxide ama miisaankooda qiyaas ahaan molecular (tusaale ahaan, PEG-4 ama PEG-200) waxay caadi ahaan tilmaamaysaa magaca glycols-ka polyethylene ee gaarka ah. Polyethylene glycols oo leh miisaan amolecular ka yar 600 waa dareere, halka kuwa miisaanka molecular-ka 1000 iyo wixii ka sareeya ay yihiin kuwo adag. Alaabadani waa kuwo aan isbeddelin, biyo-milmi kara, aan dhadhan lahayn, oo aan ur lahayn. Waxaa lagu qasi karaa biyaha, aalkolada, esters-ka, ketones-ka, dareerayaasha udgoonka leh, iyo hydrocarbons-ka koloriinaysan, laakiin laguma qasi karo alkanes, paraffins, waxes, iyo ethers.
Faahfaahinta
| Shay | Faahfaahinta |
| Barta dhalaalaysa | 64-66 °C |
| Barta karkarinta | >250°C |
| Cufnaanta | 1.27 g/mL heerkul ah 25 °C |
| Cufnaanta badan | 400-500kg/m3 |
| Cufnaanta uumiga | >1 (marka loo eego hawada) |
| Cadaadiska uumiga | <0.01 mm Hg (20 °C) |
| Tusmada Refractive | n20/D 1.469 |
| Heerkulka kaydinta. | 2-8°C |
Isticmaalka
Polyethylene Glycol waa walxo isku xidha, dahaadh, wakiil kala firdhiya, wax ka caawiya dhadhanka, iyo walxaha balaastikada sameeya oo ah dareere cad, aan midab lahayn, oo aan dhalaal lahayn, oo u eg paraffin (caddaan, wax-u-ek, ama jajab), oo leh ph ah 4.0–7.5 oo ku jira 1:20. Waxa uu ku milmaa biyaha (mw 1,000) iyo dareere badan oo dabiici ah.
Polyethylene glycol (PEG) waa qalab isku xidha, dareere, wakiil balaastig ah, iyo jilciye si weyn loogu isticmaalo saldhigyada kareemka qurxinta iyo boomaatooyinka dawooyinka. Biinanka ayaa aad u qoyan ilaa miisaan molecular ah oo ah 500. Marka laga reebo miisaankan, qaadashada biyuhu way yaraataa.
Waxaa loo isticmaalay iyadoo lala kaashanayo kaarboon madow si loo sameeyo isku-darka gudbiyaha.1 Nanospheres-ka Polymer-ka ee poly(ethylene glycol) ayaa loo isticmaalay keenista daawada.
Molecules-ka Poly(ethylene Glycol) oo qiyaastii ah 2000 oo monomers. Poly(ethylene Glycol) waxaa loo isticmaalaa codsiyo kala duwan laga bilaabo kiimikada warshadaha ilaa kiimikada bayoolojiga. Cilmi-baaris dhowaan la sameeyay ayaa muujisay in PEG ay leedahay awoodda ay ku caawiso habka soo kabashada dhaawaca laf-dhabarta, iyadoo ka caawisa habka gudbinta dareenka neerfaha ee xayawaanka. Jiirarka, waxaa la muujiyay inay ka caawiso hagaajinta axons-ka sciatic-ga ee la jaray, iyadoo ka caawisa soo kabashada dhaawaca neerfaha. Waxaa warshad ahaan loo soo saaraa walax saliidaynaysa dusha sare ee kala duwan si loo yareeyo is-xoqidda. PEG waxaa sidoo kale loo isticmaalaa diyaarinta nidaamyada gaadiidka vesicle iyadoo loo adeegsanayo hababka ogaanshaha ama hababka keenista daawada.
Baakadeynta iyo Rarista
200KG/Durbaan ama sida looga baahan yahay macaamiisha.
Waxay ka tirsan tahay alaabta caadiga ah waxayna ku keeni kartaa bad iyo cirka
Hayso oo kaydi
Muddada shelf-ka: 24 bilood laga bilaabo taariikhda la sameeyay ee baakadaha asalka ah ee aan la furin lagu kaydiyay meel qabow oo qalalan oo ka fog iftiinka qorraxda tooska ah, biyaha.
Bakhaar hawo leh, Qallajin heerkul hooseeya, Ka soocan oksaydhiyeyaasha, asiidhyada.
