EPS granular thermal insulation mortar is lightweight thermal insulation material yakasanganiswa neinorganic binder, organic binder, admixture, admixture uye light aggregate mune imwe chikamu. Mukutsvagisa kwazvino uye kushandiswa kweEPS particle insulation mortar, iyo inodzokororwa inodzokororwa redispersible latex poda ine pesvedzero huru pakuita kwedhaka uye inotora chikamu chepamusoro mumutengo, saka chagara chiri chinangwa chekutarisisa. Kuita kwekubatana kweEPS particle thermal insulation mortar yekunze madziro thermal insulation system inowanzobva kune polymer binder, uye chikamu chayo chinonyanya vinyl acetate/ethylene copolymer. Iyi mhando yepolymer emulsion inogona kupfapfaidzwa-yakaomeswa kuti iwane redispersible latex poda. Nekuda kwekunyatso gadzirira kweadhispersible latex poda mukuvaka, kufambisa kuri nyore uye kuchengetedza kuri nyore, iyo yakasununguka poda yemapolymers yave tsika yekusimudzira nekuda kwekugadzirira kwayo, kufambisa kuri nyore uye kuchengetedza kuri nyore. Kuita kweEPS particle insulation mortar kunoenderana zvakanyanya nemhando uye huwandu hwepolymer inoshandiswa. Ethylene-vinyl acetate latex powder (EVA) ine yakakwira ethylene yemukati uye yakaderera Tg (girazi shanduko tembiricha) kukosha ine zvirinani zvivakwa maererano nekukanganisa simba, bond simba uye kusamira kwemvura.
Iko optimization yekushanda kwe redispersible latex powder padhaka imhaka yekuti iyo polymer powder ndeyepamusoro molecular polymer ine polar mapoka. Kana RDP yakasanganiswa neEPS particles, iyo isiri-polar segment muketani huru yepolymer poda ichave yakashambadza mumuviri neiyo isiri-polar pamusoro peEPS. Mapoka epolar ari mupolymer anotariswa kunze pamusoro peEPS particles, zvichiita kuti EPS zvidimbu zvishanduke kubva kuhydrophobic kuenda kuhydrophilic. Pamusana pekushandurwa kwepamusoro pezvikamu zveEPS nehupfu hwepolymer, dambudziko rekuti EPS particles zviri nyore kusangana nemvura inogadziriswa. Inoyangarara, matambudziko makuru edhaka delamination. Panguva ino, pakuwedzera simende uye kubvongodza, mapoka epolar adsorbed pamusoro peEPS particles anopindirana nezvikamu zvesimende uye anobatanidza zvakanyanya, izvo zvinonyanya kuvandudza kushanda kweEPS insulation mortar. Izvi zvinoratidzwa mukuti zvimedu zveEPS zvinonyoroveswa nyore nyore nesamende slurry, uye simba rekubatanidza pakati pezviviri rinovandudzwa zvikuru.
Mushure mekunge emulsion uye redispersible latex poda yakaumbwa kuita firimu, vanogona kuumba yakakwira tensile simba uye bonding simba pazvinhu zvakasiyana. Iwo anoshandiswa seyechipiri binder mudhaka kusanganisa neinorganic binder simenti, simende uye polymer zvakateerana. Tamba simba rinoenderana uye uvandudze mashandiro edhaka. Nekuona iyo microstructure yepolymer-cement composite material, inofungidzirwa kuti kuwedzerwa kwelatex powder inogona kuita kuti firimu repolymer rive chikamu chemadziro egomba, uye kuita kuti dhaka rive rakazara kuburikidza nesimba remukati, iro rinovandudza mukati. simba redhaka. Polymer simba, nekudaro ichiwedzera kutadza kushushikana kwedhaka uye kuwedzera iyo yekupedzisira kuomarara. Kudzidza kushanda kwenguva refu kwe redispersible latex powder mudhaka, yakaonekwa nekuongorora electron microscope, mushure memakore gumi, microstructure yepolymer mudhaka haina kuchinja, kuchengetedza kugadzikana kwakadzikama, kushanduka kwesimba uye kudzvinyirira simba pamwe chete neHydrophobic yakanaka. . Kutora redispersible latex poda sechinhu chekutsvagisa, iyo nzira yekugadzira yekusimba kwetaira yekubatanidza yakadzidzwa, uye zvakaonekwa kuti mushure mekunge iyo polymer yakaomeswa mufirimu, iyo polymer firimu yakagadzira kuchinjika kubatana pakati pedhaka uye tile kune rumwe rutivi. , uye nerumwe rutivi, Mapolima ari mudhaka anowedzera mhepo yedhaka, inokanganisa kupfava uye kunyorova kwepasi, uyezve panguva yekugadzika, mapolymers anewo mhedzisiro yakanaka pane hydration process uye shrinkage ye simenti. Adhesives, izvi zvese zvinobatsira kuwedzera chisungo chesimba.
Kuwedzera redispersible latex poda kune dhaka kunogona kuvandudza zvakanyanya simba rekubatanidza nezvimwe zvinhu, nekuti iyo yemvura chikamu chehydrophilic polymer upfu uye simende kuturika inopinda mumapores uye capillaries yematrix, nepo latex hupfu inopinda mumapores uye Mukati. capillary. Iyo yemukati firimu inoumbwa uye yakasimba adsorbed pamusoro peiyo substrate, nokudaro kuve nechokwadi chekubatana kwakanaka pakati peiyo gelled zvinhu uye substrate.
Nguva yekutumira: Jun-16-2023