Iyo latex poda inozopedzisira yagadzira firimu repolymer, uye sisitimu inoumbwa neinorganic uye organic binder zvimiro inoumbwa mudhaka rakaporeswa, kureva, brittle uye yakaoma skeleton inoumbwa ne hydraulic zvinhu, uye firimu rinoumbwa neredispersible latex poda mugomba. uye nzvimbo yakasimba.flexible network.Kusimba kwekusimba uye kubatana kwepolymer resin firimu inogadzirwa nelatex poda inowedzerwa.Nekuda kwekuchinjika kwepolymer, iyo deformation kugona kwakakwira zvakanyanya kupfuura iyo yedombo resimende rakaomarara chimiro, iyo deformation kuita kwedhaka inovandudzwa, uye mhedzisiro yekuparadzira kushushikana inovandudzwa zvakanyanya, nekudaro ichivandudza kutsemuka kwedhaka. .Nekuwedzera kwezviri mukati redispersible latex poda, iyo system yese inokura yakananga kupurasitiki.Kana iri yakakwira latex poda yemukati, chikamu chepolymer mudhaka yakarapirwa zvishoma nezvishoma chinodarika inorganic hydration chigadzirwa chikamu, uye dhaka richaita shanduko yemhando uye ive elastomer, nepo hydration chigadzirwa chesimende ichiva "yekuzadza".“.
Kusimba kwesimba, elasticity, kuchinjika uye kuvharika kwedhaka rakagadziridzwa neredispersible latex poda zvese zvinovandudzwa.Kusanganiswa kwelatex poda inodzokororwa kunobvumira iyo polymer firimu (latex film) kuumba uye kuita chikamu chemadziro epore, nekudaro ichivhara iyo yakakwirira porosity chimiro chedhaka.Latex membrane ine inozvitwasanudza yega iyo inoita tension painosungirirwa padhaka.Kuburikidza nemasimba aya emukati, dhaka rinochengetedzwa sese, nokudaro richiwedzera kusimba kwakabatana kwedhaka.Kuvapo kwemapolymer anochinjika uye ane elastic zvakanyanya anovandudza kuchinjika uye elasticity yedhaka.Iyo nzira yekuwedzera kwekunetseka kwegoho uye simba rekukundikana ndeiyi inotevera: kana simba rinoshandiswa, microcracks inononoka kusvikira kushushikana kwakanyanya kwasvika nekuda kwekuvandudza kushanduka uye elasticity.Pamusoro pezvo, iyo interwoven polymer domains zvakare inotadzisa kubatana kwema microcracks mukupinda mukati.Naizvozvo, iyo redispersible polymer poda inovandudza kutadza kushushikana uye kutadza dhizaini yechinhu.
Iyo polymer firimu mupolymer yakagadziridzwa dhaka ine yakakosha mhedzisiro pakuomesa dhaka.Iyo redispersible latex poda yakagoverwa pachiratidziro inoita rimwe basa rakakosha mushure mekuparadzirwa uye firimu-kugadzira, iri kuwedzera kunamatira kune zvakabatikana zvinhu.Mune iyo microstructure yepoda polima yakagadziridzwa mataira anosungirirana dhaka uye mataira interface, iyo firimu inoumbwa nepolymer inoumba zambuko pakati pemataira ane vitrified ane yakaderera mvura yekunyudza uye simende dhaka matrix.Nzvimbo yekubatana pakati pezvinhu zviviri zvakasiyana inzvimbo ine njodzi yakanyanya yekuputsika mitswe iumbe uye inotungamira mukurasikirwa kwekubatana.Nokudaro, kukwanisa kwemafirimu e latex kuporesa shrinkage kuputika kunokosha zvikuru kune matilesi ekunamatira.
Nguva yekutumira: Kubvumbi-10-2023