Hydroxypropyl methylcellulose e fana ka seretse se metsi se nang le viscosity e ntle haholo, e ka eketsang haholo bokhoni ba maqhama pakeng tsa seretse se metsi le lera la motheo, le ho ntlafatsa ts'ebetso ea anti-sag ea seretse.E sebelisoa haholo ho polastering seretse, tsamaiso ea ka ntle ea marako a ho thibela le ho kopanya litene ka seretse.Phello e ntseng e eketseha ea cellulose ether e ka boela ea eketsa homogeneity le bokhoni ba ho thibela ho hasana ha thepa e sa tsoa tsoakoa ea samente, ho thibela delamination, karohano le ho tsoa mali a seretse le konkreite, 'me e ka sebelisoa ka konkreite ea fiber, konkreite e ka tlas'a metsi le konkreite e ikemetseng. .
Hydroxypropyl methylcelluloseHPMCeketsa viscosity ea thepa e thehiloeng samente ho tloha viscosity ea selulose ether tharollo.Lenane la "viscosity" hangata le sebelisetsoa ho lekola viscosity ea tharollo ea cellulose ether.Viscosity ea cellulose ether ka kakaretso e bolela tharollo ea cellulose ether e nang le mohopolo o itseng (joalo ka 2%).Lebelo (kapa sekhahla sa ho potoloha, joalo ka 20 rpm), boleng ba viscosity bo lekantsoeng ka sesebelisoa se itseng sa ho metha (joalo ka viscometer e potolohang).
Viscosity ke parameter ea bohlokoa ho lekola ts'ebetso ea cellulose ether.Ha li-viscosity tsa hydroxypropyl methylcellulose li phahame, li na le viscosity e ntle ea thepa e thehiloeng ho samente, ho khomarela karoloana e ka holimo, 'me ho ntlafatsa bokhoni ba ho thibela ho senyeha le ho thibela ho hasana.E matla, empa haeba viscosity ea eona e le kholo haholo, e tla ama metsi le ts'ebetso ea lisebelisoa tse thehiloeng ho samente (joalo ka ho khomarela thipa ea plaster nakong ea kaho ea seretse).Ka hona, viscosity ea cellulose ether e sebelisoang ka har'a seretse se omileng se kopantsoeng hangata ke 15,000 ~ 60,000 mPa.S-1, seretse se ikemetseng le konkreite e iketsetsang, e hlokang metsi a mangata, e hloka viscosity e tlaase ea cellulose ether.
Ho feta moo, phello e matla ea hydroxypropyl methylcellulose e tla eketsa tlhokahalo ea metsi ea thepa e thehiloeng ho samente, kahoo e eketsa chai ea seretse.
Viscosity ea tharollo ea hydroxypropyl methylcellulose e ipapisitse le lintlha tse latelang:
Boima ba molek'hule (kapa tekanyo ea polymerization) le khatello ea cellulose ether, mocheso oa tharollo, sekhahla sa ho kuta le mokhoa oa teko.
1. Ha tekanyo ea polymerization ea cellulose ether e phahame le boima ba molek'hule e kholoanyane, e phahamisa viscosity ea tharollo ea eona ea metsi;
2. Ha tekanyo (kapa mahloriso) ea cellulose ether e phahame, e phahamisa viscosity ea tharollo ea eona ea metsi, empa tlhokomelo e lokela ho nkoa ho khetha tekanyo e nepahetseng ha e sebelisoa, e le hore e se ke ea ama ts'ebetso ea seretse le konkreite haeba tekanyo e phahameng haholo;
3. Joalo ka lino tse ngata, viscosity ea tharollo ea cellulose ether e tla fokotseha ka ho eketseha ha mocheso, 'me ha mocheso oa cellulose ether o phahame, ho ba le tšusumetso e kholo ea mocheso;
4. Tharollo ea cellulose ether hangata ke pseudoplastic, e nang le thepa ea ho kuta moriri.Ha lebelo le leholo la ho kuta nakong ea teko, le theola viscosity.
Ka hona, momahano oa seretse o tla fokotseha ka lebaka la matla a ka ntle, a leng molemo ho ho hahoa ha seretse, e le hore seretse se ka ba le ts'ebetso e ntle ea ho sebetsa le ho kopana ka nako e le 'ngoe.Leha ho le joalo, tharollo ea cellulose ether e tla bonts'a litšobotsi tsa mokelikeli oa Newtonian ha mahloriso a le tlase haholo le viscosity e nyane.Ha mahloriso a ntse a eketseha, tharollo e tla bonts'a butle-butle litšobotsi tsa mokelikeli oa pseudoplastic, 'me ha mahloriso a phahame, ho hlakile haholoanyane pseudoplasticity.
Nako ea poso: Dec-20-2022