Usoro nke emulsion ntụ ntụ na-emegharị na ngwa ngwa ngwakọta akọrọ

A na-eme ka ntụ ntụ latex redispersible na ndị ọzọ inorganic adhesives (dị ka ciment, slaked lime, gypsum, ụrọ, wdg) na dị iche iche aggregates, fillers na ndị ọzọ mgbakwunye [dị ka hydroxypropyl methylcellulose, polysaccharide (starch ether), fiber Fiber, wdg] na-mere. n'ime ngwa agha agwakọta akọrọ site na ngwakọta anụ ahụ. Mgbe a na-agbakwunye ụrọ ntụ ntụ akọrọ na mmiri wee kpalie, n'okpuru ọrụ nke hydrophilic colloid na-echebe colloid na mechanical shiee Force, na latex powder particles nwere ike gbasasịa ngwa ngwa n'ime mmiri, nke zuru ezu na-etolite redispersible latex ntụ ntụ n'ime a. ihe nkiri. Ngwakọta nke ntụ ntụ roba nwere mmetụta dị iche iche na njirimara rheological nke ngwa agha na ihe ndị dị iche iche na-ewu ụlọ: njikọ nke latex ntụ ntụ na mmiri mgbe a na-emegharị ya, viscosities dị iche iche nke ntụ ntụ latex mgbe mgbasa, mmetụta na ọdịnaya ikuku. nke ngwa agha na nkesa nke ikuku ikuku, Mmekọrịta dị n'etiti ntụ ntụ roba na ihe mgbakwunye ndị ọzọ na-eme ka powders latex dị iche iche na-enwe mmetụta nke ịba ụba mmiri, ịba ụba thixotropy, na ịba ụba viscosity.

Ọ na-kweere n'ozuzu na usoro nke redispersible latex ntụ ntụ ka mma workability nke ọhụrụ ngwa agha bụ: mmekọrita nke latex ntụ ntụ, karịsịa na-echebe colloid, na mmiri mgbe ọ na-agbasasị, enwekwu viscosity nke slurry, na mma na cohesion nke slurry. ngwa agha ihe owuwu.

Mgbe ngwa ngwa agwakọta ọhụrụ nwere latex ntụ ntụ ga-etolite, na ntinye mmiri site na isi ala, oriri nke mmeghachi omume hydration, na mgbanwe ikuku, mmiri ga-eji nwayọọ nwayọọ belata, ihe resin ga-eji nwayọọ nwayọọ bịaruo nso, interface ahụ. ga-eji nwayọọ nwayọọ na-agbaji, na resins ga-eji nwayọọ nwayọọ na-ejikọta ibe ha. emesia polymerized n'ime ihe nkiri. A na-ekewa usoro mmepụta ihe nkiri polymer n'ime usoro atọ. Na nke mbụ ogbo, polymer ahụ na-agagharị n'enweghị ihe mgbochi n'ụdị Brownian ngagharị na emulsion mbụ. Ka mmiri ahụ na-ekupụ, mmegharị nke irighiri ihe ndị ahụ na-abụkarị nke a na-amachibido, na esemokwu dị n'etiti mmiri na ikuku na-amanye ha iji nwayọọ nwayọọ kwekọọ ọnụ. Na ọkwa nke abụọ, mgbe ụmụ irighiri ihe ndị ahụ na-abanye na kọntaktị, mmiri dị na netwọk ahụ na-esi na tubes capillary na-ekpochapụ, na nnukwu esemokwu capillary na-etinye n'elu ihe ndị ahụ na-eme ka nrụrụ nke oghere latex na-ejikọta ha ọnụ, na mmiri fọdụrụnụ na-ejupụta pores, a na-emepụta ihe nkiri ahụ nke ọma. Nke atọ, nke ikpeazụ na-enye ohere mgbasa (mgbe ụfọdụ a na-akpọ njide onwe onye) nke ụmụ irighiri ihe polymer ka ọ bụrụ ezigbo ihe nkiri na-aga n'ihu. N'oge a na-emepụta ihe nkiri, ụmụ irighiri ihe latex mkpanaaka dịpụrụ adịpụ na-agbakọba n'usoro ihe nkiri ọhụrụ nwere nrụgide tensile dị elu. N'ụzọ doro anya, iji mee ka polymer ntụ ntụ redispersible mee ihe nkiri na ngwa ngwa siri ike, ọ dị mkpa iji hụ na opekempe ihe nkiri na-emepụta okpomọkụ (MFT) dị ala karịa okpomọkụ ọgwụgwọ nke ngwa agha.

Colloid - polyvinyl mmanya ga-ekewapụ na polymer film usoro. Nke a abụghị nsogbu na alkaline ciment mortar system, n'ihi na polyvinyl mmanya ga-saponified site alkali eme site ciment hydration, na adsorption nke quartz ihe ga-eji nwayọọ nwayọọ kewapụ polyvinyl mmanya na usoro, na-enweghị hydrophilic colloid nchebe. , Ihe nkiri a na-emepụta site na mgbasa ozi otu oge nke redispersible latex ntụ ntụ, nke n'onwe ya na-adịghị edozi na mmiri, nwere ike ịrụ ọrụ ọ bụghị naanị na ọnọdụ akọrọ, kamakwa na ọnọdụ imikpu mmiri ogologo oge. N'ezie, na usoro ndị na-abụghị alkaline, dị ka gypsum ma ọ bụ filler-only system, n'ihi na polyvinyl mmanya ka na-adị n'ime ihe nkiri polymer ikpeazụ, nke na-emetụta nkwụsị mmiri nke ihe nkiri ahụ, mgbe a naghị eji usoro ndị a eme ihe maka mmiri ogologo oge. imikpu , na polima ka nwere ihe eji arụ ọrụ ya pụrụ iche, na polymer ntụ ntụ ka nwere ike iji mee ihe na usoro ndị a.

Site na nhazi ikpeazụ nke ihe nkiri polymer, a na-emepụta usoro nke mejupụtara inorganic na organic binder n'ime ngwa agha a gwọrọ, ya bụ, ọkpụkpụ na-agbaji agbaji na nke siri ike nke ihe hydraulic mejupụtara, na ntụ ntụ latex na-agbanwe agbanwe na-etolite ihe nkiri n'etiti oghere ahụ na elu siri ike. netwọk na-agbanwe agbanwe. A na-eme ka ike nkwụsị na njikọta nke ihe nkiri polymer resin nke ntụ ntụ latex mebere. N'ihi mgbanwe nke polymer, ikike nrụrụ dị elu karịa nke nkume ciment siri ike, arụrụ ọrụ nke ngwa agha na-eme ka ọ dịkwuo mma, na mmetụta nke nrụgide na-agbasasị na-eme ka ọ dịkwuo mma, si otú ahụ na-eme ka nkwụsị mgbape nke ngwa agha ahụ dịkwuo mma. .

Site na mmụba nke ọdịnaya nke ntụ ntụ latex na-agbanwe agbanwe, usoro ahụ dum na-etolite n'ihu plastik. N'ihe dị elu nke uzuzu uzuzu dị elu, usoro polymer n'ime ngwa agha a gwọrọ nke ọma na-eji nwayọọ nwayọọ gafere ngwaahịa hydration inorganic, na ngwa agha ahụ ga-enwe mgbanwe qualitative wee ghọọ elastomer, ebe ngwaahịa hydration nke ciment na-aghọ "filler". ". A na-emeziwanye ike ike, ngbanwe, mgbanwe na njide nke ngwa agha ahụ site na ntụ ntụ latex na-emegharị emegharị. Ngwakọta nke ntụ ntụ latex redispersible na-enye ohere ka ihe nkiri polymer (ihe nkiri latex) guzobe ma bụrụ akụkụ nke mgbidi pore, si otú ahụ na-emechi ihe owuwu nke ngwa ngwa. Akpụkpọ anụ latex nwere usoro ịgbatị onwe ya nke na-ebute esemokwu ebe a na-agbanye ya na ngwa agha. Site na ike ndị a dị n'ime, a na-edobe ngwa agha ahụ n'ozuzu ya, si otú ahụ na-abawanye ike njikọta nke ngwa agha ahụ. Ọnụnọ nke ndị na-agbanwe agbanwe na nke ukwuu na-agbanwe agbanwe na-eme ka mgbanwe na mgbanwe nke ngwa agha dịkwuo mma.

Usoro maka mmụba nke nrụgide mkpụrụ na ike ọdịda bụ nke a: mgbe a na-etinye ike, microcracks na-egbu oge ruo mgbe a ga-enwe nrụgide dị elu n'ihi mgbanwe dị mma na ngbanwe. Na mgbakwunye, ngalaba polymer kpara akpa na-egbochikwa njikọta nke microcracks n'ime oghere mgbape. Ya mere, ntụ ntụ polymer na-agbanwe agbanwe na-eme ka nrụgide ọdịda na ọdịda ọdịda nke ihe ahụ dịkwuo mma.

Ihe nkiri polymer dị na ụrọ gbanwetụrụ polymer nwere mmetụta dị oke mkpa na ngwa agha siri ike. Uzuzu latex a na-emegharị emegharị na-ekesa na interface ahụ na-arụ ọrụ ọzọ dị mkpa mgbe a gbasasịrị ya na ịmepụta ihe nkiri, nke bụ ime ka adhesion na ihe ndị a kpọtụrụ aha. Na microstructure nke ntụ ntụ polymer gbanwetụrụ taịlị bonding ngwa agha na interface tile, ihe nkiri ahụ nke polymer guzobere na-etolite akwa dị n'etiti taịlị vitrified nke nwere oke mmiri dị ala na matrix ciment ngwa agha. Mpaghara kọntaktị dị n'etiti ihe abụọ dị iche iche bụ ebe dị oke egwu maka mbelata mgbawa na-eduga na nkwụsị nke njikọta. Ya mere, ikike nke ihe nkiri latex iji gwọọ mkpọnwụ nke mgbawa dị oke mkpa maka nrapado tile.

N'otu oge ahụ, uzuzu latex na-agbanwe agbanwe nwere ethylene nwere nrapanye pụtara ìhè na ihe ndị dị ndụ, ọkachasị ihe ndị yiri ya, dị ka polyvinyl chloride na polystyrene. Ezi ihe atụ bụ ma a bịa n'ihe gbasara nkpuchi.