Redispersible polymer powder e ama joang ho feto-fetoha ha seretse?

Motsoako o na le phello e ntle ho ntlafatsa ts'ebetso ea ho haha ​​seretse se omileng se omileng.Redispersible latex phofo e entsoe ka ho omisa ka ho fafatsa ka emulsion e khethehileng ea polymer.Phofo e ommeng ea polima ke likaroloana tse chitja tsa 80 ~ 100mm tse bokaneng hammoho.Likaroloana tsena li qhibiliha habonolo ka metsing, li etsa phallo e tsitsitseng e kholoanyane ho feta likaroloana tsa pele tsa emulsion, 'me li etsa filimi ka mor'a ho felloa ke metsi le ho omisa.

Mehato e fapaneng ea phetoho e etsa hore phofo ea latex e khonehe hape e be le thepa e fapaneng e kang ho hanyetsa metsi, ho hanyetsa alkali, ho hanyetsa boemo ba leholimo le ho fetoha ha maemo.Redispersible latex phofo bakeng sa seretse e ka ntlafatsa ho hanyetsa tšusumetso, ho tšoarella, ho hanyetsa ho apara, ho ba bonolo ho haha, matla a tlamahano le momahano, ho hanyetsa boemo ba leholimo, ho hanyetsa leqhoa, ho hanyetsa metsi, matla a flexural le ho hanyetsa matla a ho phutha seretse.Ha feela thepa e entsoeng ka samente e nang le phofo ea latex e kopana le metsi, karabelo ea hydration e tla qala, 'me tharollo ea calcium hydroxide haufinyane e tla tlala le ho khanya.Ka nako e ts'oanang, likristale tsa ettringite le li-gel tsa calcium silicate hydrate lia thehoa.Likaroloana tse tiileng li kenngoa holim'a gel le likaroloana tsa samente tse se nang metsi.Ha karabelo ea hydration e ntse e tsoela pele, lihlahisoa tsa hydration lia eketseha, 'me likaroloana tsa polymer butle-butle li bokana ka har'a li-capillary pores, li etsa lera le letenya la ho bokella holim'a gel le likaroloana tsa samente tse se nang metsi.Likaroloana tse kopantsoeng tsa polymer butle-butle li tlatsa li-pores.

Redispersible latex phofo e ka ntlafatsa matla a ho kobeha le matla a tlamahano ea seretse hobane e ka etsa filimi ea polymer holim'a likaroloana tsa seretse.Ho na le li-pores holim'a filimi, 'me bokaholimo ba li-pores bo tletse seretse, se fokotsang khatello ea maikutlo.'Me e tla phomola ntle le ho senya tlas'a ketso ea matla a ka ntle.Ho phaella moo, seretse se etsa skeleton e thata ka mor'a hore samente e be le metsi, 'me polymer ka skeleton e na le mosebetsi oa manonyeletso a tsamaeang, a tšoanang le lisele tsa' mele oa motho.Lera le entsoeng ke polymer le ka tšoantšoa le manonyeletso le li-ligamente, ka hona ho netefatsa ho tsitsa le ho feto-fetoha ha skeleton e thata.

Sistimi ea seretse sa samente e fetotsoeng ka polymer, filimi e tsoelang pele le e felletseng ea polymer e kopantsoe le peista ea samente le likaroloana tsa lehlabathe, ho etsa hore seretse sohle se be ntle, 'me ka nako e ts'oanang se etsa marang-rang a rekere ka ho tlatsa li-capillaries le likheo.Ka hona, filimi ea polymer e ka fetisa khatello le khatello ea rekere ka katleho.Filimi ea polymer e ka koala mapetsong a shrinkage sehokelong sa seretse sa polymer, ea folisa mapetsong a ho honyela, le ho ntlafatsa ho tiisa le ho tiisa matla a seretse.Ho ba teng ha libaka tsa polymer tse feto-fetohang haholo le tse otlolohileng haholo ho eketsa ho feto-fetoha ha seretse, ho fana ka momahano le thepa e matla ho skeleton e thata.Ha matla a ka ntle a sebelisoa, ts'ebetso ea ho hōla ha microcrack e lieha ho fihlela khatello e phahameng e finyelloa ka lebaka la ho eketseha ha maemo le elasticity.Li-interwoven polymer domains li boetse li sebetsa e le tšitiso ea hore li-microcracks li kopane ka mapetsong a phunyeletsang.Ka hona, phofo ea polymer e ka sebelisoang hape e eketsa khatello ea maikutlo le ho hloleha ha thepa.