I-Polyethylene Glycol/PEG/CAS:25322-68-3
Incazelo emfushane:
Igama Lomkhiqizo: I-Polyethylene Glycol
I-CAS:25322-68-2
MF:(C2H4O)nH2O
MW:0
ISAKHIWO:
Ukuchazwa:
Ama-polyethylene glycols awumndeni wama-polymer aqondile akhiwe yi-base-catalyzed condensation reaction enezingxenye eziphindaphindayo ze-ethylene oxide ezifakwa ku-ethylene. Ifomula yama-molecule yi-(C2H4O)multH2O lapho i-mult imelela inani elimaphakathi lamaqembu e-oxyethylene. Isisindo sama-molecule singasukela ku-200 kuya ezigidini eziningana ezihambisana nenani lamaqembu e-oxyethylene. Izinto ezinesisindo sama-molecule aphezulu (100 000 kuya ku-5 000 000) nazo zibizwa ngokuthi ama-polyethylene oxides. Isisindo sama-molecule esimaphakathi sanoma yimuphi umkhiqizo othize we-polyethylene glycol siwela ngaphakathi kwemingcele emincane kakhulu (°5%). Inani lama-unit e-ethylene oxide noma isisindo sawo esilinganiselwe sama-molecule (isb., i-PEG-4 noma i-PEG-200) ngokuvamile lichaza ukuqanjwa kwama-polyethylene glycols athile. Ama-polyethylene glycols anesisindo sama-amolecular esingaphansi kuka-600 angamanzi, kanti lawo anesisindo sama-molecule esingu-1000 nangaphezulu aqinile. Lezi zinto aziguquguquki, azincibiliki emanzini, azinambitheki, futhi azinaphunga. Zixutshwa namanzi, ama-alcohol, ama-ester, ama-ketone, izinyibilikisi ezinuka kamnandi, nama-hydrocarbon ane-chlorine, kodwa azixutshwa nama-alkanes, ama-paraffin, ama-waxes, nama-ether.
Imininingwane
| Into | Imininingwane |
| Indawo yokuncibilika | 64-66 °C |
| Indawo yokubilisa | >250°C |
| Ubuningi | 1.27 g/mL ku-25 °C |
| Ubuningi obukhulu | 400-500kg/m3 |
| Ubuningi bomusi | >1 (uma kuqhathaniswa nomoya) |
| Umfutho womusi | <0.01 mm Hg (20 °C) |
| Inkomba yokubuka | n20/D 1.469 |
| Izinga lokushisa lesitoreji. | 2-8°C |
Ukusetshenziswa
I-Polyethylene Glycol iyi-binder, i-ejenti yokumboza, i-ejenti yokuhlakaza, i-adjuvant yokunambitha, kanye ne-ejenti yokwenza ipulasitiki ewuketshezi olucacile, olungenambala, oluqinile, olufana ne-paraffin (omhlophe, ofana ne-wax, noma ama-flakes), olune-ph engu-4.0–7.5 ku-1:20 concentration. Iyancibilika emanzini (mw 1,000) kanye nezinyibilikisi eziningi eziphilayo.
I-polyethylene glycol (PEG) iyi-binder, i-solvent, i-plasticizing agent, kanye ne-softener esetshenziswa kabanzi ezisekelweni zokhilimu wezimonyo kanye namafutha okwelapha. Ama-peg ayakwazi ukufudumala aze afike esisindweni sama-molecule angu-500. Ngale kwalesi sisindo, ukumuncwa kwawo amanzi kuyancipha.
Kusetshenziswa kanye ne-carbon black ukwakha inhlanganisela eqhubayo.1 Ama-nanospheres e-polymer e-poly(ethylene glycol) asetshenziswa ekulethweni kwemithi.
Ama-molecule e-Poly(ethylene Glycol) angama-monomer angaba ngu-2000. I-Poly(ethylene Glycol) isetshenziswa ezinhlotsheni ezahlukene kusukela kumakhemikhali ezimboni kuya kumakhemikhali ezinto eziphilayo. Ucwaningo lwamuva lubonise ukuthi i-PEG inamandla okusiza inqubo yokululama kokulimala komgogodla, isize inqubo yokuqhuba i-nerve impulse ezilwaneni. Kumagundane, kuboniswe ukuthi iyasiza ekulungisweni kwama-axon e-sciatic anqunywe, isize ekululameni kokulimala kwemizwa. Ikhiqizwa ezimbonini njengento yokugcoba ezindaweni ezahlukene ukunciphisa ukungqubuzana. I-PEG isetshenziswa futhi ekulungiseleleni izinhlelo zokuthutha ama-vesicle ngokusetshenziswa ezinqubweni zokuxilonga noma izindlela zokulethwa kwemithi.
Ukupakisha Nokuthumela
200KG/Isigubhu noma ngokwezidingo zamakhasimende.
Kungokwempahla evamile futhi kungathunyelwa ngolwandle nangomoya
Gcina futhi ugcine
Isikhathi sokuphila: Izinyanga ezingama-24 kusukela ngosuku lokwenziwa kwento epakishweni lokuqala elingavulwanga, igcinwe endaweni epholile neyomile kude nokukhanya kwelanga okuqondile, amanzi.
Indawo yokugcina izinto enomoya, Ukomisa okuphansi kwezinga lokushisa, Ihlukaniswe nama-oxidants, ama-acid.
