Polyethylene Glycol/PEG/CAS:25322-68-3
Wehewehe Pōkole:
Inoa Huahana: Polyethylene Glycol
CAS:25322-68-2
MF:(C2H4O)nH2O
MW:0
ʻANO:
Wehewehena:
ʻO nā polyethylene glycols kahi ʻohana o nā polymers linear i hoʻokumu ʻia e kahi hopena condensation base-catalyzed me nā ʻāpana ethylene oxide e hana hou ʻia ana i ka ethylene. ʻO ke ʻano molekala ʻo (C2H4O)multH2O kahi e hōʻike ai ka mult i ka helu awelika o nā hui oxyethylene. Hiki i ke kaumaha molekala mai 200 a i kekahi mau miliona e pili ana i ka helu o nā hui oxyethylene. ʻO nā mea kaumaha molekala kiʻekiʻe (100 000 a i 5 000 000) i kapa ʻia hoʻi he polyethylene oxides. ʻO ke kaumaha molekala awelika o kekahi huahana polyethylene glycol kikoʻī e hāʻule i loko o nā palena haiki (°5%). ʻO ka helu o nā ʻāpana ethylene oxide a i ʻole ko lākou kaumaha molekala kokoke (e laʻa, PEG-4 a i ʻole PEG-200) e kuhikuhi pinepine i ka nomenclature o nā polyethylene glycols kikoʻī. ʻO nā polyethylene glycols me ke kaumaha amolecular ma lalo o 600 he wai, ʻoiai ʻo nā mea o ke kaumaha molekala 1000 a ʻoi aku he paʻa. ʻAʻole hiki ke hoʻoheheʻe ʻia kēia mau mea, hiki ke hoʻoheheʻe ʻia i ka wai, ʻaʻohe ʻono, a ʻaʻohe ʻala. Hiki ke hui pū ʻia me ka wai, nā ʻalekohol, nā esters, nā ketones, nā mea hoʻoheheʻe ʻala, a me nā hydrocarbons chlorinated, akā hiki ʻole ke hui pū ʻia me nā alkanes, nā paraffins, nā waxes, a me nā ethers.
Nā kikoʻī
| Mea | Nā kikoʻī |
| Kiko heheʻe | 64-66 °C |
| Kikowaena paila | >250°C |
| Ka nui o ka paʻa | 1.27 g/mL ma 25 °C |
| Ka nui o ka nui | 400-500kg/m3 |
| Ka nui o ka mahu | >1 (vs ea) |
| Kaomi mahu | <0.01 mm Hg (20 °C) |
| ʻIkepili refractive | n20/D 1.469 |
| Mahana mālama. | 2-8°C |
Hoʻohana
He mea hoʻopaʻa, mea uhi, mea hoʻopuehu, mea hoʻohui ʻono, a me ka mea plasticizing ʻo Polyethylene Glycol. He wai maopopo, ʻaʻohe kala, viscous, hygroscopic e like me ka paraffin (keʻokeʻo, waxy, a i ʻole flakes), me ka ph o 4.0–7.5 ma ka 1:20 concentration. Hiki ke hoʻoheheʻe ʻia i ka wai (mw 1,000) a me nā mea hoʻoheheʻe organik he nui.
ʻO ka polyethylene glycol (PEG) he mea hoʻopaʻa, mea hoʻoheheʻe, mea hoʻopili plasticizing, a me ka mea palupalu i hoʻohana nui ʻia no nā kumu kirīmi hoʻonaninani a me nā poni lāʻau lapaʻau. He humectant maikaʻi nā pegs a hiki i ke kaumaha molekala o 500. Ma waho aʻe o kēia kaumaha, emi iho ko lākou lawe ʻana i ka wai.
Hoʻohana ʻia me ka ʻeleʻele kalapona e hana i kahi hui conductive.1 Ua hoʻohana ʻia nā nanospheres polymer o ka poly (ethylene glycol) no ka lawe ʻana i ka lāʻau.
ʻO nā molekala Poly(ethylene Glycol) o kahi o 2000 monomers. Hoʻohana ʻia ka Poly(ethylene Glycol) i nā ʻano hana like ʻole mai ka kemika ʻoihana a i ka kemika biological. Ua hōʻike ʻia nā noiʻi hou e mālama ana ʻo PEG i ka hiki ke kōkua i ke kaʻina hana hoʻōla i ka ʻeha o ke kaula spinal, e kōkua ana i ke kaʻina hana hoʻoili impulse nerve i nā holoholona. I loko o nā ʻiole, ua hōʻike ʻia e kōkua i ka hoʻoponopono ʻana i nā axons sciatic i ʻoki ʻia, e kōkua ana i ka hoʻōla ʻana i ka hōʻino o ke aʻalolo. Hana ʻia ia ma ke ʻano he mea lubricating no nā ʻano ʻili like ʻole e hōʻemi i ka friction. Hoʻohana ʻia ʻo PEG i ka hoʻomākaukau ʻana i nā ʻōnaehana lawe vesicle me ka noi ʻana i nā kaʻina hana diagnostic a i ʻole nā ʻano lawe lāʻau.
ʻŌpala a me ka Hoʻouna ʻana
200KG/Drum a i ʻole e like me nā koi a ka mea kūʻai aku.
No nā waiwai maʻamau a hiki ke hāʻawi ma ke kai a me ka lewa
Mālama a me ka mālama ʻana
Ola papa: 24 mahina mai ka lā i hana ʻia ai i loko o ka pahu i wehe ʻole ʻia mua i mālama ʻia i kahi maloʻo a me kahi anuanu, mai ka lā pololei, ka wai.
Hale kūʻai ea, hoʻomaloʻo wela haʻahaʻa, hoʻokaʻawale ʻia mai nā mea hoʻomake a me nā waikawa.
