Polyethylene Glycol/PEG/CAS:25322-68-3
Kev Piav Qhia Luv:
Lub Npe Khoom: Polyethylene Glycol
CAS:25322-68-2
MF:(C2H4O)nH2O
MW:0
QAUV:
Cov lus piav qhia:
Polyethylene glycols yog ib tsev neeg ntawm cov polymers linear uas tsim los ntawm kev sib xyaw ua ke nrog cov ethylene oxide units rov ua dua ntxiv rau ethylene. Cov mis molecular yog (C2H4O)multH2O qhov twg ntau qhia txog tus lej nruab nrab ntawm cov pab pawg oxyethylene. Qhov hnyav molecular tuaj yeem ntau ntawm 200 txog ntau lab sib raug rau tus lej ntawm cov pab pawg oxyethylene. Cov khoom siv hnyav molecular siab dua (100 000 txog 5 000 000) kuj raug xa mus rau polyethylene oxides. Qhov hnyav molecular nruab nrab ntawm txhua yam khoom polyethylene glycol tshwj xeeb poob rau hauv qhov txwv nqaim heev (°5%). Tus lej ntawm cov ethylene oxide units lossis lawv qhov hnyav molecular kwv yees (piv txwv li, PEG-4 lossis PEG-200) feem ntau txhais cov npe ntawm cov polyethylene glycols tshwj xeeb. Polyethylene glycols nrog qhov hnyav amolecular tsawg dua 600 yog kua, thaum cov uas muaj qhov hnyav molecular 1000 thiab siab dua yog khoom khov. Cov khoom siv no tsis hloov pauv, yaj hauv dej, tsis muaj saj, thiab tsis muaj ntxhiab. Lawv sib xyaw nrog dej, cawv, esters, ketones, aromatic solvents, thiab chlorinated hydrocarbons, tab sis tsis sib xyaw nrog alkanes, paraffins, waxes, thiab ethers.
Cov Lus Qhia Tshwj Xeeb
| Khoom | Cov Lus Qhia Tshwj Xeeb |
| Qhov kub yaj | 64-66 °C |
| Kub taw tes | >250°C |
| Qhov Ceev | 1.27 g/mL ntawm 25 °C |
| Qhov ceev ntawm cov khoom loj | 400-500kg/m3 |
| Qhov ceev ntawm cov pa dej | >1 (piv rau huab cua) |
| Lub zog ua pa | <0.01 hli Hg (20 °C) |
| Cov ntsuas kev cuam tshuam | n20/Hnub 1.469 |
| Cia txias. | 2-8°C |
Kev Siv
Polyethylene Glycol yog ib yam khoom siv los khi, ua kom txheej, ua kom tawg, ua kom tsw qab, thiab ua kom yas uas yog ib yam kua ntshiab, tsis muaj xim, nplaum, thiab hygroscopic zoo li paraffin (dawb, zoo li quav ciab, lossis flakes), nrog rau ph ntawm 4.0–7.5 hauv 1:20 concentration. Nws yaj tau hauv dej (mw 1,000) thiab ntau yam organic solvents.
polyethylene glycol (PEG) yog ib yam khoom siv los khi, ua kom yaj, ua kom yas, thiab ua kom mos uas siv dav rau cov tshuaj pleev kom zoo nkauj thiab cov tshuaj pleev tshuaj. Cov pegs muaj cov dej noo ntau txog li qhov hnyav molecular ntawm 500. Dhau qhov hnyav no, lawv cov dej nqus yuav txo qis.
Siv ua ke nrog cov pa roj carbon dub los tsim cov khoom sib xyaw ua ke.1 Cov polymer nanospheres ntawm poly (ethylene glycol) tau siv rau kev xa tshuaj.
Cov poly (ethylene Glycol) molecules ntawm kwv yees li 2000 monomers. Poly (ethylene Glycol) yog siv rau hauv ntau yam kev siv los ntawm kev lag luam chemistry mus rau biological chemistry. Cov kev tshawb fawb tsis ntev los no tau qhia tias PEG muaj peev xwm los pab cov txheej txheem rov qab los ntawm kev raug mob ntawm tus txha caj qaum, pab cov txheej txheem ntawm cov hlab ntsha hauv cov tsiaj. Hauv cov nas, nws tau pom tias pab kho cov sciatic axons uas raug txiav, pab rov qab los ntawm kev puas tsuaj ntawm cov hlab ntsha. Nws yog tsim los ntawm kev lag luam ua cov khoom siv roj rau ntau qhov chaw kom txo qhov sib txhuam. PEG kuj tseem siv rau hauv kev npaj cov vesicle thauj mus los nrog kev siv rau cov txheej txheem kuaj mob lossis cov txheej txheem xa tshuaj.
Ntim thiab Xa Khoom
200KG / Nruas los yog raws li cov neeg siv khoom xav tau.
Yog cov khoom siv dav dav thiab tuaj yeem xa los ntawm dej hiav txwv thiab huab cua
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
