Cov khoom
Polyethylene Glycol
Qhov Ceev 1.125g/cm3;
Melting Point 60 ~ 65 ° C;
Refractive Index 1.458-1.461;
Qhov Kub Ntsig 270 ° C;
Yaj hauv dej, cawv thiab ntau lwm cov kuab tshuaj organic;
Siab Vapor Tsawg;
Thermal Ruaj Khoov; Tsis tshua muaj tshuaj lom neeg; Tsis hydrolyzed; Tsis lwj.
PEG uas muaj qhov hnyav sib txawv muaj ntau hom duab sib txawv. Qhov tsos hloov pauv nrog qhov hnyav molecular los ntawm cov kua tuab (Mn = 200 ~ 700), semi-khoom tawv (Mn = 1000 ~ 2000) mus rau cov khoom tawv tawv (Mn = 3000 ~ 20000).
Cov Ntaub Ntawv Txog Kev Siv
| SN | Khoom | Chav tsev | Qib 1 | Qib 2 |
| 1 | Mn | g/mol ×104 | 0.9 ~ 1.0 | 1.0 ~ 1.2 |
| 2 | Cov Ntsuas Kev Sib Kis | D | ≤ 1.2 | |
| 3 | Tus nqi hydroxyl | mmol KOH/g | 0.24 ~ 0.20 | 0.21 ~ 0.17 |
| 4 | Tus Nqi Acid | mg KOH/g | ≤ 0.05 | |
| 5 | Cov ntsiab lus dej | % | ≤0.6 | |
| 6 | Lub Sijhawm Khaws Cia | xyoo | ≥ 1 | |
Cov Lus Cim
1) tag nrho cov ntaub ntawv kev qhia saum toj no yog rau koj siv.
2) lwm cov lus qhia tshwj xeeb raug txais tos rau kev sib tham ntxiv.
Kev tuav pov hwm
Kev siv tshuaj yuav tsum ua rau qhov chaw uas muaj cua nkag tau zoo. Hnav cov khoom siv tiv thaiv kom zoo. Tiv thaiv kom tsis txhob muaj hmoov av nkag mus rau hauv. Ntxuav tes thiab lub ntsej muag kom huv si tom qab siv.
Cov kev ceev faj rau kev tuav pov hwm kom zoo. Tsis txhob kom raug daim tawv nqaij thiab qhov muag. Tsis txhob ua rau muaj hmoov av thiab cov pa phem. Muab cov pa tawm kom zoo rau ntawm qhov chaw uas muaj hmoov av.
Kev Khaws Cia
Khaws cia rau qhov chaw txias. Kaw lub thawv kom nruj rau qhov chaw qhuav thiab muaj cua nkag tau zoo. Qhov kub cia kom zoo yog 2 – 8 °C.
Cov ntaub ntawv txog kev thauj mus los
Tsis raug tswj hwm raws li cov khoom phom sij.
