Cov hmoov polymer uas tawg ua tej daim me me (RDP) yog cov copolymer uas ua los ntawm vinyl acetate thiab ethylene uas tsim los ntawm kev siv tshuaj tsuag kom qhuav. Nws yog ib qho tseem ceeb hauv ntau yam kev siv hauv kev tsim kho, ua rau cov khoom siv cement lo rau zoo dua, yooj ywm dua thiab ruaj khov dua. Kev tsim cov hmoov polymer uas tawg ua tej daim me me muaj ntau kauj ruam.
1. Kev xaiv cov khoom siv raw:
Vinyl acetate-ethylene copolymer: Cov khoom siv tseem ceeb ntawm RDP yog ib qho copolymer ntawm vinyl acetate thiab ethylene. Cov copolymer no tau raug xaiv rau nws cov khoom nplaum zoo heev thiab muaj peev xwm ua kom muaj kev ywj pheej thiab kev tawv ntawm cov ntaub ntawv cementitious.
2. Kev sib xyaw ua ke ntawm cov khoom sib xyaw ua ke:
Cov txheej txheem ntau lawm pib nrog emulsion polymerization, uas vinyl acetate thiab ethylene monomers raug polymerized nyob rau hauv lub xub ntiag ntawm initiators thiab stabilizers.
Cov txheej txheem emulsion polymerization raug tswj hwm kom zoo kom tau txais qhov hnyav molecular, cov khoom sib xyaw, thiab cov qauv copolymer xav tau.
3. Kev sib xyaw ua ke thiab kev sib xyaw ua ke:
Vinyl acetate thiab ethylene monomers ua ke nyob rau hauv lub xub ntiag ntawm ib qho catalyst los tsim ib tug copolymer.
Cov txheej txheem copolymerization yog qhov tseem ceeb heev kom tau txais cov polymers nrog cov khoom xav tau, suav nrog cov khoom zoo tsim zaj duab xis thiab redispersibility.
4. Tshuaj tsuag kom qhuav:
Tom qab ntawd cov emulsion yuav raug rau hauv cov txheej txheem kom qhuav. Qhov no suav nrog kev txau cov emulsion rau hauv lub chamber kub, qhov twg cov dej ua pa, tawm hauv cov khoom khov kho ntawm cov polymer uas tawg tau dua.
Cov xwm txheej ziab tshuaj tsuag, xws li qhov kub thiab cua ntsawj, raug tswj kom zoo kom ntseeg tau tias muaj cov hmoov me me ntws dawb.
5. Kev kho qhov chaw:
Kev kho qhov chaw feem ntau yog siv los txhim kho qhov ruaj khov ntawm kev khaws cia thiab kev rov ua dua ntawm cov hmoov polymer.
Cov tshuaj ntxiv hydrophobic lossis cov colloids tiv thaiv feem ntau siv rau hauv kev kho qhov chaw kom tiv thaiv cov khoom me me agglomeration thiab txhim kho cov hmoov dispersion hauv dej.
6. Kev tswj xyuas zoo:
Cov kev ntsuas tswj xyuas zoo nruj heev raug siv thoob plaws hauv cov txheej txheem tsim khoom. Cov kev ntsuas xws li kev faib tawm ntawm qhov loj me ntawm cov khoom me me, qhov ceev ntawm cov khoom loj, cov ntsiab lus ntawm cov monomer seem thiab qhov kub hloov iav raug saib xyuas kom ntseeg tau tias cov khoom sib xws.
7. Ntim:
Cov hmoov polymer uas tawg tau zaum kawg tau ntim rau hauv cov thawv uas tiv taus dej kom tiv thaiv kev nqus dej, uas yuav cuam tshuam tsis zoo rau nws txoj kev ua haujlwm.
Cov ntawv thov ntawm Redispersible Polymer Hmoov:
RDP siv rau ntau yam kev siv hauv kev tsim kho suav nrog cov nplaum pobzeb, cov khoom sib xyaw ua ke, cov tshuab ua kom tiav sab nraud (EIFS) thiab cov cement mortars.
Cov hmoov no ua rau cov khoom xws li tiv taus dej, yooj ywm thiab lo, pab txhim kho kev ua tau zoo thiab kev ruaj khov ntawm cov khoom siv hauv tsev no.
xaus lus:
Hmoov polymer uas tawg tau dua yog ib yam khoom siv tau ntau yam uas siv tau rau hauv kev lag luam kev tsim kho. Nws cov khoom tsim tawm suav nrog kev xaiv cov khoom siv raw, kev sib xyaw ua ke ntawm cov emulsion, kev ziab tshuaj tsuag, kev kho qhov chaw thiab kev tswj xyuas zoo.
Kev tsim cov hmoov polymer uas rov ua dua tshiab yog ib qho txheej txheem nyuaj uas xav tau kev ua tib zoo thiab kev saib xyuas kom meej kom tau txais cov khoom zoo nrog cov yam ntxwv uas xav tau rau kev siv hauv kev tsim kho.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-18-2023