0102030405
A na-eji Methyl cellulose eme ihe n'?t?t? ebe
Nk?wa
Methylcellulose b? ether cellulose na-ab?gh? ionic, nke a na-emep?ta site na etherification site na iwebata ìgwè methyl n'ime cellulose.
Methylcellulose b? cellulose methyl ether. ?cha ma ? b? ìhè edo edo ma ? b? ìhè isi aw? obere ah?, filamentous ma ? b? nt? nt?. Enwegh? isi na enwegh? ?t?, yana ihe d?ka 27% ruo 32% nke otu hydroxyl d? n'?d? otu methoxy. ?kwa d? iche iche nke methyl cellulose nwere ogo d? iche iche nke polymerization, sitere na 50 ruo 1000; Na ?d? ar? molek?la ya (nkezi) sitere na 10000 ruo 22000 Da, na ogo ngbanwe ya ka ak?wara d? ka ?n? ?g?g? nke otu methoxy, nke jik?tara ya na nkeji glucose anhydride ? b?la na agb?.
nk?wa2
Njirimara an? ah? na kem?kal?
1, ?d?d?:Fibrous ?cha ma ? b? d? ?cha ma ? b? nt? nt? granular, enwegh? isi na enwegh? ?t?.
2, Ngw?ta:Ihe f?r? nke nta ka ? b?r? ihe na-ad?gh? edozi na ethanol, ether, chloroform (1: 1) na ngwak?ta nwere ike ?mep?ta ngw?ta doro anya ma ? b? kw?s?t?r? viscous. Na 80-90 oC mmiri ?k? na-agba ?s? ngwa ngwa, na-aj? oyi mgbe mgbasa ngwa ngwa, mgbaze mmiri na ?l? okpom?k? kw?siri ike, gel okpom?k? d? elu, ? na-enweta mgbanwe mgbanwe site na gel na mgbasa mgbe kpochara na oyi.
3, àgwà:Magburu onwe wettability, mgbasa, adhesion, ndim, emulsifying, mmiri na-ejide na film-akp?, na mman? impermeability. Ihe nkiri a nwere ezigbo ike, mgbanwe na ngh?ta. N'ihi na ? b?gh? ionic, ? nwere ike dak?tara na emulsifiers nd? ?z?, ma ? d? mfe ?w?p? nnu na ngw?ta ah? kw?siri ike na pH 2-12.
4, Njup?ta:1.3g/cm; Njup?ta p?tara ìhè: 0.25-0.7 g/cm3.
5, okpom?k? mgbanwe agba:190-200oC.
6, okpom?k? ikuku:225-230oC.
7, Esemokwu d? n'elu:47-53 den/cn.
Nk?wap?ta ngwaah?a
Mpempe akw?kw? ?b?ch? nka:
| Aha oru ngo | Ihe ngosi (usoro 55AX) |
| Methoxyl | 27.0-32.0 |
| Gel okpom?k? | 50-55 |
| Ak?r? ad?gh? ar? | ≤5 |
| Ihe f?d?r? na-ere ?k? | ≤1 |
| Igwe d? ar? | ≤20 |
| Nnu arsenic | ≤2 |
| Ph. | 5.0-8.0 |
| Viscosity | H? nhazi ?kwa viscosity |
Nk?wap?ta viscosity
| Otu | Nk?wap?ta | Oke |
| Ala viscosity | 50 | 40-60 |
| 100 | 80-120 | |
| 400 | 350-450 | |
| Nnukwu viscosity | 1000 | 800-1200 |
| 2000 | 1600-2400 | |
| 4000 | 3500-4500 | |
| Extra elu viscosity | 30000 | 24000-36000 |
| 50000 | 45000-55000 | |
| 75000 | 70000-80000 | |
| 100000 | 85000-105000 |