Ntxiv cov polymers tuaj yeem txhim kho qhov impermeability, toughness, tawg tsis kam thiab cuam tshuam tsis kam ntawm mortar thiab pob zeb. Permeability thiab lwm yam muaj txiaj ntsig zoo. Piv nrog rau kev txhim kho lub zog flexural thiab kev sib txuas lub zog ntawm mortar thiab txo nws cov brittleness, cov nyhuv ntawm redispersible latex hmoov rau kev txhim kho cov dej tuav ntawm mortar thiab txhim kho nws cohesion yog txwv.
Redispersible polymer hmoov feem ntau ua tiav los ntawm cov tshuaj tsuag kom qhuav los ntawm kev siv qee cov emulsions uas twb muaj lawm. Cov txheej txheem yog thawj zaug tau txais cov polymer emulsion los ntawm emulsion polymerization, thiab tom qab ntawd tau txais los ntawm cov tshuaj tsuag kom qhuav. Txhawm rau tiv thaiv cov agglomeration ntawm cov hmoov latex thiab txhim kho cov kev ua tau zoo ua ntej cov tshuaj tsuag kom qhuav, qee cov tshuaj ntxiv yog feem ntau ntxiv, xws li cov kab mob bactericides, tshuaj tsuag kom qhuav additives, plasticizers, defoamers, thiab lwm yam, thaum lub sij hawm tshuaj tsuag kom qhuav, los yog tsuas yog tom qab ziab. Ib tus neeg tso tawm yog ntxiv los tiv thaiv clumping ntawm cov hmoov thaum lub sij hawm cia.
Nrog rau qhov nce ntawm cov ntsiab lus ntawm redispersible latex hmoov, tag nrho cov txheej txheem tsim los ntawm yas. Nyob rau hauv cov ntaub ntawv ntawm high latex hmoov cov ntsiab lus, lub polymer theem nyob rau hauv lub kho mortar maj mam tshaj cov inorganic hydration khoom, lub mortar hloov zoo thiab dhau los ua ib tug elastic lub cev, thiab cov khoom hydration ntawm cov cement ua "filler". . Cov zaj duab xis tsim los ntawm redispersible latex hmoov faib nyob rau hauv lub interface plays lwm lub luag hauj lwm tseem ceeb, uas yog, txhim khu lub adhesion rau cov ntaub ntawv tiv tauj, uas yog haum rau ib co nyuaj-rau-stick nto, xws li tsis tshua muaj dej nqus los yog Non- Qhov chaw nqus dej (xws li cov pob zeb du thiab cov khoom siv cement, cov phaj hlau, cov cib homogeneous, vitrified cib nto, thiab lwm yam) thiab cov khoom siv organic (xws li EPS boards, plastics, thiab lwm yam) yog qhov tseem ceeb tshwj xeeb. Vim tias kev sib koom ua ke ntawm cov khoom siv tsis zoo rau cov ntaub ntawv tau ua tiav los ntawm lub hauv paus ntsiab lus ntawm kev siv tshuab, uas yog, hydraulic slurry nkag mus rau hauv qhov khoob ntawm lwm cov ntaub ntawv, maj mam solidifies, thiab thaum kawg txuas lub mortar rau nws zoo li tus yuam sij embedded hauv lub xauv. Qhov saum npoo ntawm cov khoom, rau saum npoo nyuaj-rau-txheej txheem, tsis tuaj yeem nkag mus rau hauv cov khoom siv sab hauv kom tsim tau cov khoom siv zoo, yog li cov mortar uas tsuas yog cov nplaum nplaum tsis zoo rau nws, thiab kev sib txuas. mechanism ntawm polymer yog txawv. , Cov polymer yog sib koom ua ke rau saum npoo ntawm lwm cov ntaub ntawv los ntawm kev quab yuam intermolecular, thiab tsis nyob ntawm qhov porosity ntawm qhov chaw (ntawm chav kawm, qhov ntxhib saum npoo thiab qhov sib txuas ntxiv yuav txhim kho qhov adhesion).
Post lub sij hawm: Mar-07-2023