I-Polyethylene Glycol/PEG/CAS: 25322-68-3
Inkcazo emfutshane:
Igama leMveliso: iPolyethylene Glycol
I-CAS: 25322-68-2
MF:(C2H4O)nH2O
MW:0
ULWAKHIWO:
Ukuchazwa:
Iipolyethylene glycols zintsapho yeepolymers ezithe ngqo ezenziwe yi-base-catalyzed condensation reaction kunye neeyunithi ze-ethylene oxide eziphindaphindayo ezongezwa kwi-ethylene. Ifomula yemolekyuli yi-(C2H4O)multH2O apho i-mult ibonisa inani eliqhelekileyo lamaqela e-oxyethylene. Ubunzima bemolekyuli bunokusukela kwi-200 ukuya kwizigidi ezininzi ezihambelana nenani lamaqela e-oxyethylene. Izinto ezinobunzima bemolekyuli ephezulu (100 000 ukuya kwi-5 000 000) zikwabizwa ngokuba zii-polyethylene oxides. Ubunzima bemolekyuli obuqhelekileyo bayo nayiphi na imveliso ye-polyethylene glycol ethile buwela ngaphakathi kwemida emincinci (°5%). Inani leeyunithi ze-ethylene oxide okanye ubunzima bazo bemolekyuli obuqikelelweyo (umz., i-PEG-4 okanye i-PEG-200) zihlala zichaza amagama ee-polyethylene glycols ezithile. Iipolyethylene glycols ezinobunzima be-amolecular obungaphantsi kwama-600 zilulwelo, ngelixa ezo zinobunzima bemolekyuli obuyi-1000 nangaphezulu ziqinile. Ezi zinto aziguquguquki, azinyibiliki emanzini, azinancasa, kwaye azinavumba. Zixutywa namanzi, iialcohols, iiesters, iiketones, izinyibilikisi ezinuka kamnandi, kunye neehydrocarbons ezikhlorini, kodwa azixutywanga neealkanes, iiparafini, iiwaxes, kunye neeethers.
Inkcazo
| Into | Inkcazo |
| Indawo yokunyibilika | 64-66 °C |
| Indawo yokubila | >250°C |
| Uxinano | 1.27 g/mL kwi-25 °C |
| Unizi lolwapho kuyiwa khona | 400-500kg/m3 |
| Uxinano lomphunga | >1 (xa kuthelekiswa nomoya) |
| Uxinzelelo lomphunga | <0.01 mm Hg (20 °C) |
| Isalathisi sokubonisa ukukhanya | n20/D 1.469 |
| Ubushushu bokugcina. | 2-8°C |
Ukusetyenziswa
I-Polyethylene Glycol yi-binder, i-coating agent, i-dispersing agent, i-flavouring adjuvant, kunye ne-plasticizing agent eyilwelo ecacileyo, engenambala, ekrakra, efana neparafini (emhlophe, ene-wax, okanye iiflakes), ene-ph ye-4.0–7.5 kwi-1:20 concentration. Iyanyibilika emanzini (mw 1,000) kunye nezinye izinyibilikisi ezininzi ze-organic.
I-polyethylene glycol (PEG) sisithambisi, isinyibilikisi, i-plasticizing agent, kunye nesithambisi esisetyenziswa kakhulu kwiziseko zekhrimu yokuhombisa kunye namafutha okugcoba amayeza. Ii-pegs zinomswakama ofikelela kubunzima beemolekyuli ezingama-500. Ngaphaya kobu bunzima, ukufunxwa kwamanzi kwazo kuyancipha.
Isetyenziswe kunye nekhabhoni emnyama ukwenza i-conductive composite.1 Ii-nanospheres ze-polymer ze-poly(ethylene glycol) zisetyenzisiwe ekuhanjisweni kwamayeza.
Iimolekyuli zePoly(ethylene Glycol) ezimalunga nama-2000 eemonomers. IPoly(ethylene Glycol) isetyenziswa kwiindlela ezahlukeneyo ukusuka kwikhemistri yemizi-mveliso ukuya kwikhemistri yebhayoloji. Uphando lwakutshanje lubonise ukuba i-PEG inamandla okunceda inkqubo yokubuyisela ukwenzakala komgogodla, inceda inkqubo yokuqhuba i-nerve impulse kwizilwanyana. Kwiimpuku, ibonakalisiwe ukuba inceda ekulungiseni ii-axons ze-sciatic ezinqunyulweyo, inceda ekubuyiseleni umonakalo we-nerve. Yenziwa kwimizi-mveliso njengento yokuthambisa kwiindawo ezahlukeneyo ukunciphisa ukungqubana. I-PEG ikwasetyenziswa ekulungiseleleni iinkqubo zokuthutha ii-vesicle kunye nokusetyenziswa kwiinkqubo zokuxilonga okanye iindlela zokuhambisa amayeza.
Ukupakishwa kunye nokuthunyelwa
200KG/Idrama okanye ngokweemfuno zomthengi.
Yeyokwempahla eqhelekileyo kwaye inokuhanjiswa ngolwandle nangomoya
Gcina kwaye ugcine
Ixesha lokuphelelwa: Iinyanga ezingama-24 ukususela kumhla wokwenziwa kwayo kwiphakheji yokuqala engavulwanga igcinwe kwindawo epholileyo neyomileyo kude nelanga elithe ngqo, amanzi.
Indawo yokugcina umoya, Ukomisa kubushushu obuphantsi, Yahlulwe kwii-oxidants, ii-asidi.
