Mhedzisiro yekukora kweether ye cellulosezvinoenderana ne: mwero wepolymerization ye cellulose ether, kuwanda kwemhinduro, mwero wekucheka, tembiricha nezvimwe. Hunhu hwe gelling hwemushonga uyu hwakasiyana nealkyl cellulose nezvimwe zvinogadzirwa nawo. Hunhu hwe gelation hune chekuita ne mwero wekutsiva, kuwanda kwemhinduro nezvimwe zvinowedzerwa. Kune zvinogadzirwa ne hydroxyalkyl zvakagadziriswa, hunhu hwe gel hune chekuitawo ne mwero wekuchinja we hydroxyalkyl. Kune low viscosity MC ne HPMC, 10%-15% solution inogona kugadzirwa, medium viscosity MC ne HPMC zvinogona kugadzirwa 5%-10% solution, uye high viscosity MC ne HPMC zvinogona kugadzira 2%-3% solution chete, uye kazhinji kupatsanurwa kwe viscosity ye cellulose ether kunoiswawo mu grade ne 1%-2% solution.
Cellulose ether ine uremu hwakawanda ine simba guru rekukora, uye mapolymer ane huremu hwakasiyana hwemamorekuru ane viscosities dzakasiyana mu concentration imwe chete. Target viscosity inogona kuwanikwa chete nekuwedzera huwandu hwakawanda hwe cellulose ether ine uremu hushoma hwemamorekuru. Viscosity yayo haina kunyanya kutsamira pa shear rate, uye high viscosity inosvika pa target viscosity, zvichida kuwedzera kushoma, uye viscosity inoenderana ne thickening efficiency. Naizvozvo, kuti uwane kugadzikana kwakati, imwe huwandu hwe cellulose ether (concentration ye solution) uye solution viscosity inofanira kuvimbiswa. Tembiricha ye gel ye solution inodererawo linearly nekuwedzera kwe concentration ye solution, uye ma gels pa room tembiricha mushure mekusvika pa concentration yakati. Gelling concentration ye HPMC yakakwira zvakanyanya pa room tembiricha.
Kuenderana kunogonawo kugadziriswa nekusarudza saizi yezvikamu uye kusarudza ether dze cellulose dzine madhigirii akasiyana ekuchinja. Chinonzi shanduko ndechekuunza mwero wakati wekutsiva mapoka ehydroxyalkyl pachimiro cheskeleton cheMC. Nekushandura marelative substitution values ezvikamu zviviri, kureva, marelative substitution values eDS neMS emapoka emethoxy nehydroxyalkyl atinowanzo taura. Zvinodiwa zvakasiyana-siyana zvekushanda kwe cellulose ether zvinogona kuwanikwa nekushandura marelative substitution values ezvikamu zviviri.
Mhinduro yemvura ye cellulose ether ine viscosity yakakura ine thixotropy yakawanda, iyo inovawo hunhu hukuru hwe cellulose ether. Mhinduro dzemvura dze MC polymers dzinowanzova ne pseudoplastic uye non-thixotropic fluidity pasi petembiricha yavo ye gel, asi hunhu hweNewtonian flow pa low shear rates. Pseudoplasticity inowedzera nehuremu hwemamorekuru kana huwandu hwe cellulose ether, zvisinei nerudzi rwe substituent uye mwero wekutsiva. Naizvozvo, cellulose ethers dze viscosity grade imwechete, zvisinei ne MC, HPMC, HEMC, dzichagara dzichiratidza hunhu hwakafanana hwe rheological chero bedzi huwandu netembiricha zvichiramba zvakagadzikana. Ma gels echimiro anoumbwa kana tembiricha yakwidzwa, uye kuyerera kwakanyanya kwe thixotropic kunoitika. Ma ether e cellulose ane viscosity yakaderera uye low viscosity anoratidza thixotropy kunyangwe pasi petembiricha ye gel. Hunhu uhwu hunobatsira zvikuru pakugadziriswa kwekuenzana uye kudzikira mukuvaka mortar yekuvaka.
Zvinofanira kutsanangurwa pano kuti kana viscosity yeether ye cellulose, kuchengetedza mvura kuri nani, asi viscosity yakakwira, huwandu hwemamorekuru e cellulose ether hwakakwira, uye kudzikira kwakafanana kwekunyungudika kwayo, izvo zvine mhedzisiro yakaipa pakuwanda kwemortar uye mashandiro ekuvaka. Viscosity yakakwira, mhedzisiro yekukora kwayo iri pachena, asi haina kuenzana zvachose. Viscosity yepakati nepasi, asi modified cellulose ether ine mashandiro ari nani mukuvandudza simba rekuvaka remortar yakanyorova. Nekuwedzera kweviscosity, kuchengetedza mvura kwe cellulose ether kunovandudzika.
Nguva yekutumira: Kubvumbi-28-2024