0102 ib0304 ib05
Methyl cellulose yog dav siv
Kev piav qhia
Methylcellulose yog non-ionic cellulose ether, uas yog tsim los ntawm etherification los ntawm kev qhia methyl pawg rau hauv cellulose.
Methylcellulose yog cellulose methyl ether. Dawb los yog lub teeb daj los yog lub teeb grey me me, filamentous los yog hmoov. Tsis muaj ntxhiab thiab tsis qab, nrog kwv yees li 27% mus rau 32% ntawm pawg hydroxyl tam sim no nyob rau hauv daim ntawv ntawm methoxy pawg. Cov qib sib txawv ntawm methyl cellulose muaj ntau qib ntawm polymerization, xws li 50 txog 1000; Thiab nws qhov hnyav molecular (nruab nrab) yog li ntawm 10000 txog 22000 Da, thiab nws qhov kev hloov pauv tau txhais tau tias yog qhov nruab nrab ntawm cov methoxy pawg, uas txuas nrog rau txhua chav piam thaj anhydride ntawm cov saw hlau.
piav 2
Physical thiab Chemical Properties
1, Zoo:Dawb los yog quasi-dawb fibrous los yog granular hmoov, tsw thiab tasteless.
2, Kev daws teeb meem:Yuav luag insoluble nyob rau hauv ethanol, ether, chloroform (1: 1) nyob rau hauv cov sib tov yuav tsim ib tug ntshiab los yog suspended viscous kua. Nyob rau hauv 80-90 oC dej kub sai sai o, txias tom qab dissolution sai, dej dissolution nyob rau hauv chav tsev kub yog heev ruaj khov, siab kub gel, nws undergoes ib tug reversible hloov los ntawm gel rau dissolution tom qab cua sov thiab txias.
3, Cov yam ntxwv:Zoo wettability, dispersion, adhesion, thickening, emulsifying, dej tuav thiab zaj duab xis-forming, thiab roj impermeability. Zaj duab xis muaj zoo heev toughness, yooj thiab pob tshab. Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm cov emulsifiers, tab sis nws yog ib qho yooj yim kom salted tawm thiab cov tshuaj yog ruaj khov nyob rau hauv qhov ntau ntawm pH 2-12.
4, Ceev:1.3g / cm3; pom ceev: 0.25-0.7 g / cm3.
5, Discoloration kub:190-200oC.
6, Carbonization kub:225-230 oC.
7, Nto tension:47-53 ib.
Khoom specification
Daim ntawv qhia hnub:
| Lub npe qhov project | Qhov taw qhia (55AX Series) |
| Methoxyl | 27.0-32.0 Nws |
| Gel kub | 50-55 |
| Qhuav weightlessness | ≤ 5 |
| Hlawv residue | ≤1 |
| Hnyav hlau | ≤ 20 |
| Arsenic ntsev | ≤ 2 |
| Ph. | 5.0-8.0 Nws |
| viscosity | Saib kev faib viscosity |
viscosity specifications
| Qeb | Specification | Ntau yam |
| Tsawg viscosity | 50 | 40-60 |
| 100 | 80-120 : kuv | |
| 400 | 350-450 : kuv | |
| Siab viscosity | 1000 | 800-1200 Nws |
| 2000 | 1600-2400 Nws | |
| 4000 | 3500-4500 Nws | |
| Ntxiv siab viscosity | 30000 | 24 000-36 000 Nws |
| 50000 | 45000-55000 | |
| 75 000 | 70000-80000 | |
| 100000 | 85000-105000 |