Cov hmoov polymer uas tawg tau dua (RDPs) ua lub luag haujlwm tseem ceeb hauv ntau yam lag luam, suav nrog kev tsim kho, cov nplaum, thiab cov txheej txheem. Cov hmoov no siv dav rau kev txhim kho cov yam ntxwv ntawm cov ntaub ntawv cementitious, txhim kho kev nplaum, kev ywj pheej, thiab kev ruaj khov. Kev nkag siab txog cov txheej txheem tsim khoom ntawm RDPs yog qhov tseem ceeb rau cov chaw tsim khoom kom ntseeg tau tias cov khoom zoo.
Cov Khoom Siv Raw:
Kev tsim cov hmoov polymer uas tawg tau dua pib nrog kev xaiv cov khoom siv raw uas cuam tshuam rau cov khoom kawg. Cov khoom tseem ceeb suav nrog cov polymer resins, cov colloids tiv thaiv, cov yas ua kom yas, thiab ntau yam khoom ntxiv.
Cov Tshuaj Polymer: Ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), thiab acrylic polymers feem ntau yog siv ua cov tshuaj polymer tseem ceeb. Cov tshuaj no muab kev nplaum, kev ywj pheej, thiab kev tiv thaiv dej rau RDPs.
Cov Colloids Tiv Thaiv: Cov hydrophilic tiv thaiv colloids xws li polyvinyl cawv (PVA) lossis cellulose ethers raug ntxiv los tswj cov polymer particles thaum lub sijhawm ziab thiab khaws cia, tiv thaiv kev sib sau ua ke.
Cov Plasticizers: Cov Plasticizers txhim kho qhov yooj ywm thiab ua haujlwm tau ntawm RDPs. Cov plasticizers feem ntau suav nrog glycol ethers lossis polyethylene glycols.
Cov Khoom Ntxiv: Ntau yam khoom ntxiv xws li cov khoom sib cais, cov khoom ua kom tuab, thiab cov neeg sawv cev sib txuas yuav raug suav nrog los txhim kho cov khoom tshwj xeeb xws li kev sib cais, rheology, lossis lub zog kho tshuab.
Cov Txheej Txheem Ua Haujlwm:
Kev tsim cov hmoov polymer uas rov ua dua tshiab muaj ntau kauj ruam ua tiav, suav nrog kev ua kom cov emulsion polymerization, kev ziab tshuaj tsuag, thiab cov txheej txheem tom qab kho.
Kev sib xyaw ua ke ntawm emulsion:
Cov txheej txheem pib nrog emulsion polymerization, qhov twg monomers, dej, emulsifiers, thiab initiators raug sib xyaw hauv lub reactor nyob rau hauv kev tswj hwm ntawm qhov kub thiab siab. Cov monomers polymerize los ua cov latex me me dispersed hauv dej. Kev xaiv ntawm monomers thiab cov xwm txheej reaction txiav txim siab qhov sib xyaw ua ke thiab cov khoom ntawm polymer.
Kev Ruaj Ntseg thiab Kev Coagulation:
Tom qab polymerization, cov latex raug stabilization los ntawm kev ntxiv cov colloids tiv thaiv thiab stabilizers. Cov kauj ruam no tiv thaiv cov khoom me me coagulation thiab ua kom muaj kev ruaj khov ntawm cov latex dispersion. Cov neeg sawv cev coagulation yuav raug ntxiv rau hauv los ua kom cov khoom me me latex coagulation tswj tau, tsim cov coagulum ruaj khov.
Tshuaj tsuag kom qhuav:
Cov kua nplaum uas ruaj khov lawm ces muab tso rau hauv lub tshuab ziab kom qhuav. Hauv lub tshuab ziab kom qhuav, cov kua nplaum ntawd raug muab ua cov tee dej me me siv cov taub hau siab. Cua kub raug tso rau tib lub sijhawm kom ua kom cov dej uas muaj nyob hauv qhuav, thiab tseem tshuav cov khoom polymer khov. Cov xwm txheej ziab, suav nrog qhov kub ntawm huab cua nkag, lub sijhawm nyob, thiab qhov nrawm ntawm huab cua, cuam tshuam rau cov qauv ntawm cov khoom thiab cov khoom ntawm hmoov.
Tom Qab Kev Kho Mob:
Tom qab txau kom qhuav, cov hmoov polymer uas tau los ntawm kev kho tom qab kom txhim kho nws txoj kev ua tau zoo thiab kev ruaj khov ntawm kev khaws cia. Cov txheej txheem no suav nrog kev hloov kho qhov chaw, kev ua granulation, thiab kev ntim khoom.
a. Kev Hloov Kho Qhov Nto: Cov neeg sawv cev ua haujlwm ntawm qhov chaw lossis cov neeg sawv cev sib txuas yuav raug siv los hloov kho cov yam ntxwv ntawm qhov chaw ntawm cov khoom polymer, ua kom lawv cov khoom sib kis tau zoo thiab sib xws nrog lwm cov ntaub ntawv.
b. Kev ua kom cov hmoov me me: Txhawm rau txhim kho kev tuav thiab kev sib kis, cov hmoov polymer yuav raug ua kom cov hmoov me me sib npaug thiab txo cov hmoov av.
c. Kev Ntim Khoom: Cov RDP kawg raug ntim rau hauv cov thawv uas tiv taus dej noo kom tiv thaiv kev nqus dej noo thiab tswj lawv qhov ruaj khov thaum lub sijhawm khaws cia thiab thauj mus los.
Kev Tswj Xyuas Zoo:
Kev tswj xyuas zoo yog qhov tseem ceeb thoob plaws hauv cov txheej txheem tsim khoom kom ntseeg tau tias muaj kev sib xws thiab kev ntseeg tau ntawm cov khoom ntawm cov hmoov polymer uas tawg tau dua tshiab. Muaj ntau yam tseem ceeb uas tau saib xyuas thiab tswj hwm ntawm ntau theem:
Cov Khoom Siv Raw Zoo: Kev tshuaj xyuas thiab kev sim cov khoom siv raw, suav nrog cov polymers, colloids, thiab cov khoom ntxiv, raug ua kom paub tseeb tias lawv zoo, huv si, thiab sib xws nrog daim ntawv thov.
Kev Saib Xyuas Txheej Txheem: Cov txheej txheem tseem ceeb xws li qhov kub thiab txias ntawm cov tshuaj tiv thaiv, qhov siab, qhov nrawm ntawm cov monomer, thiab cov xwm txheej ziab raug saib xyuas thiab kho kom zoo tas li kom tswj tau cov khoom zoo thiab sib xws.
Kev Txheeb Xyuas Cov Khoom Me Me: Kev faib tawm ntawm cov khoom me me, morphology, thiab cov khoom ntawm qhov chaw ntawm cov hmoov polymer raug tshuaj xyuas siv cov txheej txheem xws li laser diffraction, electron microscopy, thiab kev tshuaj xyuas thaj chaw ntawm qhov chaw.
Kev Ntsuas Kev Ua Tau Zoo: Cov hmoov polymer uas tawg tau dua tshiab raug kuaj xyuas kev ua tau zoo ntau yam los ntsuas lawv lub zog nplaum, kev tsim zaj duab xis, kev tiv thaiv dej, thiab cov khoom siv kho tshuab raws li cov qauv kev lag luam thiab cov neeg siv khoom xav tau.
Kev Ntsuas Kev Ruaj Ntseg: Kev ntsuam xyuas kev laus sai thiab kev tshawb fawb txog kev ruaj ntseg tau ua los ntsuas qhov kev ruaj ntseg mus sij hawm ntev ntawm RDPs nyob rau hauv ntau yam kev mob cia khoom, suav nrog qhov kub thiab txias sib txawv.
Kev tsim cov hmoov polymer uas rov ua dua tshiab muaj ntau cov kauj ruam nyuaj, txij li kev ua kom cov emulsion polymerization mus rau kev ziab tshuaj tsuag thiab cov txheej txheem tom qab kho. Los ntawm kev tswj cov khoom siv raw, cov txheej txheem ua haujlwm, thiab cov kev ntsuas tswj xyuas zoo, cov chaw tsim khoom tuaj yeem ua kom zoo thiab ua tau zoo ntawm RDPs rau ntau yam kev siv hauv kev tsim kho, cov nplaum, thiab kev lag luam pleev xim. Kev nkag siab txog qhov nyuaj ntawm cov txheej txheem tsim khoom yog qhov tseem ceeb rau kev ua kom zoo dua cov yam ntxwv ntawm cov khoom thiab ua tau raws li cov kev xav tau ntawm cov neeg siv khoom hauv kev ua lag luam.
Lub sijhawm tshaj tawm: Lub Peb Hlis-12-2024