Dispersible polymer hmoov thiab lwm yam khoom noj khoom haus inorganic, gynced txivtistres, polysaccharulose, thiab lwm yam, fiber ntau, thiab lwm yam.] Yog lub cev sib xyaw ua kom qhuav-cug cug. Thaum cov tshuaj ntxuav hmoov qhuav ntxiv ntxiv rau dej thiab nplawm, cov tshuab hluav taws xob pov tseg, uas yog txaus kom cov redispersible looj hmoov. Cov khoom siv roj hmab ntawm cov roj hmab hmoov sib txawv, uas muaj kev cuam tshuam ntawm cov tshuaj khib thiab ntau yam kev tsim kho ntawm cov hmoov txhuv nplej siab, qhov txawv viscosity tom qab dispersion, cov hmoov txawv tom qab dispersion, cov hmoov txawv, cov nyhuv ntawm Cov ntsiab lus huab cua ntawm lub cug thiab faib cov npuas, kev sib cuam tshuam ntawm cov hmoov roj hmab ua kom muaj hmoov ntau ntxiv, nce ntxiv thixotropy, thiab nce viscostroposity, thiab ua rau muaj visccosity sib txawv.
Nws yog feem ntau ntseeg tias cov tshuab uas redispersible looj, muaj ib qho kev sib xyaw ua ke ntawm cov slurry thiab txhim kho cov cohesion ntawm lub siv lub tshuaj khib.
Tom qab cov tshuaj khib tshiab uas muaj cov dej ntws ntawm cov pa tawm, cov dej maj mam txo qis, thiab cov dej ntws tau nce zuj zus, lub interface maj mam tawg , thiab lub resin maj mam fuses nrog txhua lwm yam. Thaum kawg polymerized rau hauv zaj duab xis. Cov txheej txheem ntawm polymer zaj duab xis tsim tau muab faib ua peb theem. Nyob rau hauv thawj theem, cov polymer hais tawm mus dawb rau hauv daim ntawv ntawm brownian suab nyob rau hauv thawj zaug emulsion. Raws li cov dej yaj, kev txav ntawm cov lus yog ib txwm muaj ntau thiab ntau qhov kev ntxhov siab ntawm cov dej thiab huab cua ua rau maj mam ua ke. Nyob rau theem ob, thaum cov ntsiab lus pib sib chwv, thiab cov capinteric loj tau thov rau qhov tsis txaus siab, thiab lub siab capillary tau thov kom lawv fuse ua ke, thiab Cov dej uas tseem nyob hauv qhov hws, thiab zaj duab xis yog cov kwv yees li. Qhov thib peb thiab theem kawg nkaus ua rau kev sib txawv (qee zaum hu ua tus kheej-adhesion) ntawm cov polymer lwg me me los ua ib zaj yeeb yaj kiab ib txwm muaj. Thaum lub sijhawm ua yeeb yaj kiab, lub tshuab txawb cais tawm ua ke ua cov yeeb yaj kiab nyias nyias theem nrog kev ntxhov siab siab. Pom tseeb, nyob rau hauv kev txiav txim rau cov dispersible polymer hmoov kom tsim tau cov yeeb yaj kiab hauv qhov ntsuas kub (Mft)
Colloids - polyvinyl cawv yuav tsum tau cais los ntawm cov polymer membrane system. Qhov no tsis yog teeb meem hauv Alkaline Collation Collation, vim tias cov qoob loo polyvinyl yuav maj mam cais cov pa roj polyvinyl los ntawm cov kab ke, tsis muaj lub hydrophilic tiv thaiv colloid Cov. , Zaj duab xis tsim los ntawm dispersing lub redispersible looj dej, uas tsis tau ua haujlwm hauv cov xwm txheej qhuav, tab sis tseem nyob rau hauv cov kev mob ntev. Ntawm chav kawm, hauv cov tshuab tsis yog-alkaline, xws li gypsum lossis cov tshuab nrog tsuas yog cov yeeb yaj kiab kawg, thaum cov kab ke no tsis siv rau cov dej ntev Immersion, thiab cov polymer tseem muaj nws cov yam ntxwv cov yam ntxwv, cov hmoov nplej tsis txaus ntseeg tseem tuaj yeem siv rau hauv cov kab ke no.
Nrog rau qhov kawg tsim ntawm cov yeeb yaj kiab polymer, cov txheej txheem muaj kev sib xyaw ntawm cov ntaub ntawv kho mob hydraulic, thiab cov khoom siv nyuaj polymer yog tsim nyob rau hauv qhov sib txawv thiab khoom loj. Saj zawg zog network. Lub zog tensile thiab cohesion ntawm cov duab dhos polymer resin tsim los ntawm cov hmoov yas yooj yim. Vim tias qhov hloov zuj zus ntawm cov polymer, lub peev xwm deformation yog ntau dua li cov qauv sib xyaw ua ke, yog li kev txhim kho cov capt tsis kam ntawm lub cug Cov.
Nrog kev nce ntawm cov ntsiab lus ntawm dispersible polymer hmoov, tag nrho cov kab ke tsim rau cov yas. Nyob rau hauv cov ntaub ntawv ntawm cov ntsiab lus siab ntawm latex hmoov, cov tshuaj khib nyiab nyob rau hauv lub inrastomer cov kev hloov tsim nyog thiab ua ib qho kev ua haujlwm ntawm cov xis yuav los ua "muab tub lim". Lub zog tensile, elasticity, yooj yim thiab sealing cov khoom ntawm lub cug hloov nrog cov hmoov uas tsis sib xyaw polymer tau zoo dua. Kev koom ua ke ntawm cov dispersible polymer tso cai rau cov yeeb yaj kiab polymer (li cov yeeb yaj kiab yas) los ua cov qauv sib tov, cov qauv sib xyaw ntawm lub tshuaj khib. Daim mem tes latex muaj tus kheej-ncab tshuab hluav taws xob uas siv cov nro kom nruj rau nws lub tog hluav taws xob nrog lub tshuaj khib. Los ntawm cov rog sab hauv, lub cug yog tuav raws li tag nrho, yog li nce cov cohesive zog ntawm lub tshuaj khib. Lub xub ntiag ntawm cov hloov tau yooj yim thiab elastic polymers txhim kho qhov hloov tau yooj yim thiab elasticity ntawm lub tshuaj khib. Tus txheej txheem rau kev nce ntxiv nyob rau hauv cov kev ntxhov siab thiab tsis ua hauj lwm yog li nram no: thaum lub zog siv tau vim muaj kev txhim kho thiab tsis muaj kev ntxhov siab kom txog thaum muaj kev ntxhov siab ntau dua. Tsis tas li ntawd, cov interwoven polymer domains kuj tab cinder kev sib koom ua ke ntawm microcacks rau hauv cov kab nrib pleb. Yog li ntawd, cov neeg tsis txaus siab polymer hmoov nce qhov kev ntxhov siab tsis ua haujlwm thiab tsis ua tiav cov khoom siv.
Lub polymer zaj duab xis nyob rau hauv lub polymer-modified cug cug muaj ib qho tseem ceeb heev rau qhov ua kom tawv ntawm lub cug. Cov refispersible polymer hmoov faib rau ntawm lub luag haujlwm tseem ceeb dua tom qab tau tsim ib zaj yeeb yaj kiab, uas yog kom nce cov nplaum rau cov ntaub ntawv sib cuag. Nyob rau hauv microstructure ntawm thaj chaw sib cuam tshuam ntawm cov hmoov polymer-mapified ceramic delasing thiab ceramic cov ceramic ceramic cov pobzeb nrog cov dej pheeb suab tsis muaj zog thiab cov xis tsw qab. Thaj chaw tiv tauj ntawm ob thaj chaw uas tsis sib xws yog qhov kev pheej hmoo tshwj xeeb muaj kev pheej hmoo tshwj xeeb qhov chaw uas tsis zoo. Yog li ntawd, lub peev xwm ntawm cov yeeb yaj kiab ntawm cov duab yas kom zoo shrinkage cracks plays ib lub luag haujlwm tseem ceeb hauv pobzeb cov nplaum.
Nyob rau tib lub sijhawm, cov neeg recispersible polymer muaj cov ethylene muaj ntau dua cov nplaum rau cov organic substrates, tshwj xeeb tshaj yog cov khoom zoo sib xws, xws li polyvinyl chloride thiab polystyrene. Tus yam ntxwv zoo ntawm
Lub Sijhawm Post: Oct-31-2022