Redispersible latex poda inowanzoshandiswa organic gelling material. Ihupfu hunowanikwa nekupfapfaidza-kuomesa emulsion yepolymer ine polyvinyl doro sekudzivirira colloid. Hupfu uhu hunokwanisa kuparadzirwa mumvura zvakaenzana mushure mekusangana nemvura. , kugadzira emulsion. Kuwedzera redispersible latex poda inogona kuvandudza mashandiro emvura ekuchengetedza simende ichangobva kusanganiswa semende, pamwe nekuita kwekubatanidza, kuchinjika, kusamira uye kusadzivirirwa kwekuomarara kwesamende yakaoma simende.
Mhedzisiro ye latexr powder pane bond simba resimende-based materials
Emulsion uye redispersible latex powder inogona kuumba simba rakasimba uye simba rekubatanidza pazvinhu zvakasiyana mushure mekugadzirwa kwefirimu, dzinoshandiswa sechipiri binder mudhaka kubatanidza ne inorganic binder simende, simende uye polymer zvakateerana Ipa kutamba kwakazara kune anowirirana masimba ekuvandudza. kushanda kwedhaka. Nekucherechedza kuumbwa kwe microstructure yepolymer-cement composite material, zvinotendwa kuti kuwedzerwa kwelatex powder inogona kuita kuti polymer iite firimu uye ive chikamu chemadziro egomba, uye kuita kuti dhaka rive rakazara kuburikidza nechisimba chemukati. iyo inovandudza simba remukati revhu. Polymer simba, nekudaro kuvandudza kutadza kushushikana kwedhaka uye kuwedzera iyo yekupedzisira kuomarara. Kushanda kwenguva refu kweiyo redispersible latex powder mumatope yakadzidzwa. Yakacherechedzwa neSEM kuti mushure memakore gumi, iyo microstructure yepolymer mudhaka haina kuchinja, uye kugadzikana kwakagadzikana, flexural uye compressive resistance yakachengetedzwa. simba uye kudzora mvura zvakanaka. Iyo redispersible latex poda yakadzidza magadzirirwo esimba rekunamatira tile, uye yakaona kuti mushure mekuoma kwepolymer uye kuumbwa kuita firimu, firimu repolymer rinogadzira chinongedzo chinoshanduka pakati pedhaka uye tile kune rumwe rutivi, uye pane Nerumwe rutivi, dhaka nyowani Iyo yepakati polima inowedzera mhepo yedhaka uye inokanganisa kuumbwa uye kunyorova kwepasi, uyezve panguva yekugadzika maitiro, iyo polymer zvakare ine simba riri nani pane hydration process uye shrinkage ye simenti mukati. the binder, zvose Izvi zvichabatsira kuvandudza chisungo simba.
Kuwedzera redispersible latex poda kune dhaka kunogona kuvandudza zvakanyanya kusimba kwekubatanidza nezvimwe zvinhu, nekuti iyo hydrophilic latex poda uye yemvura chikamu chesimende yekumisikidza inopinda mumapores uye capillaries yematrix, uye latex hupfu inopinda mumapores uye capillaries. . Iyo yemukati firimu inoumbwa uye yakasimba adsorbed pamusoro pepamusoro pe substrate, nokudaro kuve nechokwadi chesimba rakanaka rechisungo pakati pesimende zvinhu uye substrate.
Kugadziriswa kwe latex powder pakushanda kwedhaka kunokonzerwa nekuti latex powder ndeyepamusoro molecular polymer ine mapoka epolar. Kana latex poda yakasanganiswa neEPS particles, iyo isiri-polar segment mucheni huru ye latex powder polymer ichaita Physical adsorption ichaitika neiyo isiri-polar pamusoro peEPS. Mapoka epolar ari mupolymer anotariswa kunze pamusoro peEPS particles, kuitira kuti maEPS particles ashanduke kubva kuhydrophobicity kuenda kuhydrophilicity. Pamusana pekushandurwa kwepamusoro peEPS particles ne latex powder, inogadzirisa dambudziko rekuti EPS particles inoratidzirwa nyore nyore kumvura. Kuyangarara, dambudziko rekukura kukuru kwedhaka. Panguva ino, kana simende yawedzerwa uye yakasanganiswa, mapoka epolar adsorbed pamusoro peEPS particles anopindirana nezvikamu zvesimende uye anobatanidza zvakanyanya, kuitira kuti kushanda kweEPS insulation mortar kuwedzere. Izvi zvinoratidzwa mukuti zvimedu zveEPS zvinonyoroveswa nyore nyore nesamende paste, uye simba rekubatanidza pakati pezviviri rinovandudzwa zvikuru.
Nguva yekutumira: Mar-14-2023